ohh.. ok, cuz i was thought its me only i used to fast tx like other coins i don't expect this long.
The transactions themselves are actually pretty quick. If you sit and watch the blockchain climb there is nothing slow about it. at least 1 block per minute sometimes 2. The problem is not with boom. My best guess is that the wait for bittrex to swap over enough to the hot-wallet is was you are waiting for.
If you want to watch a long transfer. Try move BIG from your wallet to bittrex.