My own purely anecdotal observations comes from one of the PIAS stores that I frequent. This store has a lot of F2 discs and used discs, so I drop in fairly often.
Last Spring this PIAS store binge-bought Champion VRocs and XT Whales (many with the first-run star stamping). They've sold some of them but a lot of that inventory has remained on the shelves to this day. IMHO they overbought (sales-pitched into it?) and those that are going to buy already did buy. However, they have not indulged in acquiring any Colts, so they're missing out on that.
The other PIAS store I go to most often madea point to branch out into other brands. I got my Lucid Judge, CB Warden and Prodigy discs from them. They have a more varied selection of Innova discs, also, and a good number of F2 discs. They also are selling DX VRocs, which tempted me but I resisted. This PIAS never had very many Whales at all, but they did stock up on Colts, and appear to be moving those briskly. I would add that the staff at this store listens to customer requests and gets in the discs that disc golfers recommend (there are two major DG courses not far from them, as well, so we're talking some good DG player traffic there).
Again, that is all anecdotal observations and occasionally talking to the staff at the stores there. My thinking in asking the question about Whale sales is its relative success to what Innova is thinking of doing with this V-Aviar. I guess we'll see...