The Bro is definitely your best bet to hold a line. The early classes with this round of hiring likely won't spend long on reserve. How long exactly is tough to say but for these first couple classes I'd guess a month or two simply because that is how long it will take for the next class of new hires to get to the line behind them. Like rcfd said, it can be a crap shoot though. Prepare for the worst and hope for the best.

Take the Bro, you won't regret it!