Agreed. Very frustrating indeed! I have been on a T-Mobile 8700g since 7/3 and have had these problems since signing up. Never had a single issue with a 7130e on VZW. I don't know that it's apples to apples since at the time I had the 7130e (January through April) I was on BIS 1.8. Don't know if VZW is on 1.8 or 2.0 now...
My delays are longest (hours sometimes) during east coast business hours. Things are better after hours and on weekends.
See:
http://blackberryforums.com/showthread.php?t=41285 http://blackberryforums.com/showthread.php?t=40973 http://blackberryforums.com/showthread.php?t=40114
You are not alone. Not that it helps much to ease the frustration! I've been back and forth on canceling the $20/month BB plan until they get this mess straightened out, but truth be told, I love my BB too much to be without it!!