What do you guys think, anybody know if it's possible to check if any of the recipient wallets are exchange addresses?
it is not possible to know for sure but you can always make a good guess. in this case since none of those funds have moved you can be certain that the receiving addresses do not belong to exchanges since the exchange systems are automatic and they move any funds that are deposited in your exchange wallet address.
not to mention that whales never sell on exchanges!
Last time something like this happened it was a Mt. Gox trustee and the market dumped hard shortly after.
WRONG.
last time a whale (Mt Gox) moved their coins to sell you didn't even find out about it. instead when about 4-6 months past and the price drop started the news sites started publishing the false information and that made you think it was Mt Gox that caused the crash.