I don't think there's really a "typical" timeframe anymore, thanks to the change in NALP rules. Firms (at least mine) is giving out fewer offers at a time, and applicants are holding offers longer (until the end of the 45 day period) because they're waiting for other firms before releasing offers. It seems to be causing a huge traffic jam.
I perhaps wouldn't get my hopes up, simply because it's kind of late in the game, and many firms are taking smaller classes. I don't know that I'd assume the worst yet, either. Offers are still going out as 45 day deadlines pass.