I haven't had more than two notifications since I updated to WP 8.1. Then this morning my phone came alive and every app that I use daily to communicate started to show up in my action center. Messenger, Facebook, Twitter, foursquare. Don't know what happened or how long is going to last, but I hope it stays like this. It's awesome not having to rush to my phone to see a notification. Just push the action center down and its all there waiting for me. Not to mention that Cortana finally started working for me too. Up until today I couldn't even do a search, she'd asked to try again later can't connect at this time.