I've heard that about the pink Ys, honestly, i was disappointed in the pink Ys (they also did look old, and i heard about the stockpile story from both mint guys i normally consult)
i popped a pink y, then kept eating half blue as, and never really got that WOOSH and then rolling sensation i do from normal pills. The recent presses have been rather disappointing except the green bbs blew my mind (both the bbs from early this year and the new, lighter green ones). The pink =s were pretty good too, just not super strong. really lovey tho.
I remember that normally when minting it up if i take one I'm faced. I believe that with the Blue As and Pink Ys id need to double drop to feel anything. I RARELY, if ever, roll more than once a month (lolla and UMF were exceptions).
Thats just my two cents. I hear that the green BBs and Green asterisks are the best around, and from my experience the BBs blew my face off. Pink =s made me want to hug everything. Blue blanks (convex, concave) made me roll kinda... Blue As and Pink Ys were taken same day and never really did the trick. Blue As were certainly more potent than the Ys tho