After the rejections, the App Store's developers second biggest concern is most certainly the approval delay. Indeed, having to wait a couple weeks for their apps to show up and not being able to push bug fixes quickly is a total pain.
Well, it seems like actually those days are pretty much over. According to 148Apps' App Store metrics, not only the delay is slowly reducing, but it reached a new low this November. Having an app approved in November took only 4 days on average and that is with 376 apps per day being submitted.
I guess Apple seriously beefed up its reviewing team for the holidays, good move since this the amount of apps submitted this December was about 935 per day.