I'm entering this conversation a bit late, but I can tell you about my experience...
My DD was born at 31 weeks. She spent 2 weeks in the NICU and 5 weeks in the Special Care Nursery (where I was able to room in, and did). She had no major health problems, however. At the beginning of week 33, we attempted to breastfeed (before then she had been fed only by EBM via her NG tube). She latched like a pro! The LC there told me that she took to the breast better than many full-term babies she had seen. In fact, DD received her full feeding at the breast the first time (40ml). The next day, we attempted to bottle feed. That didn't go so well. She didn't really like the bottle. But, she was "nippling" about 1-2 times a day, and I would make one of these attempts a breastfeeding.
Once we got to the Special Care Nursery, I wanted to breastfeed more. In fact, I argued to make every "nippling" a breastfeeding attempt and ditch the bottles totally. I was told, then, by the nurses and doctors that no baby goes home from the NICU bf'd only. The reason was because breastfeeding was so stressful on the baby and it took a lot of work to get the milk out of the breast as opposed to the bottle. I was told there was no such thing as nipple confusion and I could just work on BF'ing once we got home. This seemed to strange to me, and I began to research. I contacted LLL and read Dr. Newman's site, among other things. Dr. Newman's site actually has a video of preemies in Africa BF'ing!! In fact, he says that breastfeeding is easier on preemies than is a bottle. It's awesome. However, my DD and I were never allowed to make every nippling a breastfeeding. I found this so odd because for my DD, bottlefeeding was extremely stressful. She absolutely hated it. She has always loved to BF!
In our situation, I think it was sad that doctors and nurses didn't listen to me. My child loved to breastfeed and was much better at it than bottling. AND, I was living with her, so I could feed on demand. However, even though I requested it several times, they never allowed me to feed on demand. My theory was that the nurses and doctors favored bottles, not necessarily because they are easier (I'm sure for some, if not most, babies they are; but my DD found BF'ing easier and more comforting), but because it was a method of feeding that nurses could do easily without mom being there. On our floor, for instance, I was only 1 of 3 moms rooming in, and I was only 1 of 2 moms pumping/BF'ing. The bottle was much easier to do, even if the mother is rooming in and available. In fact, I had one NICU nurse and one LC confirm this reasoning to me.
So, in the end, it was extremely frustrating because I felt the "bottle-feeding police" trumped the LC's and didn't take time to work with me or my baby and let us get out of the hospital BF'ing exclusively, rather than pumping exclusively. There were only 2 times when I saw them force feed my child a bottle, and from then on, if my DD didn't take a bottle willingly, she was gavaged. I would not have my child be force fed a bottle just so the nurse could write in her report "completed nippling attempts". To me, that was a failure, not a success. I've heard of too many preemies having oral aversions, and I wasn't going to allow my child to associate feeding with stress.
So, for the OP, I see where you're coming from. I am through having children (this was my first and only), but if I had to do it again, I, too, would adopt the "tube to boob" approach. I tried to argue for this once during her stay, but was "reported" to the occupational therapists and doctors and they paid me a visit, pretty much, telling me that if I insisted on breastfeeding, I would make my child sicker and she would end up spending several more weeks in the NICU all because of me. The whole experience was very traumatizing -- never before had I felt that my power and role as a mother was being trumped so someone could treat a patient like every other patient and wheel them out the door as soon as possible, without taking into consideration other factors(baby liked to BF, mom was living at the hospital, etc.)
I hope you've had lots of success breastfeeding since then, though!!