As per subject, I'd like to know if WP8 has better notification than WP7.x
For example, Facebook notifications are really broken in 7.x, typically showing up more than half an hour later.
With Whatsapp I get often the notifications 5 to 10 minutes later, sometimes they show up at the correct time.
This is what really bothers me, because I see friends with Android and iPhone that do not have the same issues.