I have been at my prepregnancy weight by my 6-week appt each time. I attribute that to breastfeeding. I had gained about 20 extra pounds prior to my first pregnancy due to a car wreck that resulted in 6 mos of physical therapy. After each of my first 3 pregnancies, I dropped a clothing size. With my first son, though, I went back to my pre-pg size (not a size smaller). This go-round, I was in my pre-pg jeans by 2 weeks pp!
As far as the boob-leakage thing goes, I usually stop being soaked by 3 mos, stop wearing pads during the day around 6 mos, and stop needing them at night by around 9 mos. Right now, at 7 weeks pp, I'm still doing the spraying thing, so I am soaking through even my really good, thick, cloth pads. boo. But I know that this, too, shall pass!