Nope. Turns out it worked, dude.
Do you have a BoA account yourself? How long did it take to show up in your Bitfloor account?
Yeah, it was a BoA debit card (also my checking account card), and I wrote cash on the deposit slip and sent the card up the tube along with the slip to the teller. You might be right that they wouldn't do it if it wasn't a BoA card -- without fees, at least.
I made it to the bank right before 5pm yesterday, receipt said 5:02pm, so the teller told me it wouldn't be sent until the next day (today). Bitfloor website says the money came in to my account at noon today. It's hard to gauge the amount of time it took to actually do the transfer, though, as we don't know how soon the BoA systems got around to finalizing the transaction this morning. It was "pending" on my account last night, so, worst case scenario, it took until the beginning of banking today until noon, meaning around 3-4 hours to do the actual transaction.
I'll have to try it again at some point before 5pm one day so we can see if this method is identical to handing them cash.