Nobody can obviously say exact number.
But in general Nihilarian is right. Find the draft thread and the moment we were on the clock and we new it was going to be either Josh. Also look at posts shortly after selection. There were like 30-40 posts screaming Rosen a IIRC only Nihilarian and maybe one other guy said Allen is better choice.
I think it was quite a clear indication what fans thought at that time.
All-22 is out there. Unless there is another flag I don't see, there is no chance Josh took it into account, since that flag was thrown when ball was already in the air.