Haven't found a list yet. But starch granule diameter might be a clue:
potato 35 (I think the units are microns)
garbanzo beans 20.3
sweet potato 18
wheat 16.5 (different source says 20-35)
oat (similar to rice)
Shape probably also matters - corn starch has a funny shape compared to most other starches, and it's well recognized as hard to digest. Wheat, barley, and rye have a lentil shaped starch (round and flat). Arrowroot, chickpea, and potato are oval. Oats, rice, and sorghum are polygons.
So what I take away from that is DS has trouble with larger starches and funny shaped ones .
ETA: OMG, I'm searching the internets for starch granule diameters. Seriously, this needs to stop !
Hi panserborne! (I just got the urge to call you thinking bear...) it's great to see you! How are things in your part of the world?