I noticed that the unread email badge on the mail app is really slow to update when I read mail from my iMac or iPad. It will show unread emails for quite a long time until I open up mail on my iPhone and then it clears. However when I read the mail first from the phone the message gets marked as read or deleted instantly on the iMac. I am just curious as to why it is so slow updating to the phone and not from the phone if that makes sense. I am coming from Google active sync and the badge count got updated so much faster with it.