the foam which i used in my pelican came from the package from AKG. but i did use pick and pluck foam for the other part. it is the standard greyish foam. the consistency of the foam is almost identical to that of the AKG stuff. i never figured there was any difference. i'm not doubting you chris...just sayin' it really looks and feels similar.
edit to say: it is crazy that i'm sure MANY tapers have probably used the standard P&P foam without experiencing any problems (thankfully)