The population of BF3 is declining quickly. I think we'll see a nice increase come B2K tomorrow for the PC, but I don't think it will ever go passed the population it hits this week. EA is killing BF3 by limiting to the unpopular origin, by being so damn uptight about patches, unrealistic release dates (let's be fair, this game was not ready to be released by far), and with their outlandish banning habits. DICE also isn't doing so great with odd balancing implementations, and questionable features (e.g. regenerating vehicles, sun glare, art directions, etc.). I still play it, and enjoy it a bit, but the game could have been a lot better, and I'm worried they'll forget about it before they can really patch it to completion.
To be fair though, this patch did contain B2K maps I believe, which is why it was so huge (correct me if I'm wrong).