There is a trend of craft breweries headed towards naturally carbing in bottles instead of mass force carbing, but I know for a fact that Dale's is not in this camp, and I doubt Stone is either on their normal IPA. Stone is a very "green" brewery, so I'm sure they do have some naturally carbed varieties, but I'm sure it is clearly stated on the packaging. I don't think I've ever had a Hebrew Genesis before.
Here in FL, all Oskar Blues beers, like Dale's Pale Ale, are in cans, and there should be ZERO chance of floaties in a can.
Do you happen to be pouring these beers into frosty glasses? Frost from frosty glasses often clumps into little soft ice bunches and floats to the surface right when the beer is poured. It looks alot like yeast clumps, but it's just ice.