Do any of y'all that have installed ios 6.1 see an improvement with imessage. I have a concern that has never been resolved. Messages at times deliver within a split second and some take 5-10 minutes. It's getting worse and worse and I need this fixed. I have iphone 5. I'm seeing the problem with multiple people that have the iPhone. They have the same concern sending back to me also. I am hoping the concern is resolved as this makes the phone unusable for texting.