When did you watch him? Heard he was a bust til Christmas but turned it around and was in the running for player of the year at BMG.
Here's the deal with Bradley. I have no doubts that he'll be a good-very good player in the prem (I just don't know when could be 3-6 months; could be 2 years). However, he's not the kind of player that will get better sitting on the bench. You will have to play him and most likely put up with some growing pains as BMG did. He's a smart player with some good talents (goal scoring, work rate, his defense has improved tremendously, passing needs work).
At under 5M he's a steal (if Southgate bought him Boro would have stayed up, he would have been a good fit on that squad and BMG only paid like 2M for him). He's arguably the 3rd best player on the American squad (Howard, Donovan), he's only 21 and I think would link up well with Peanut. Barring a crash out in Europe he can easily get 30 starts on our squad and get good exp in meaningless group stage matches.
That being said if he is one of BMGs best players then I can't see them selling him and even if Bradley wants to go I don't think he's the kind of player who would force a transfer.
EDIT: One more thing, he'll need training camp too. If he's signed in classic everton way on August 27th then kiss his 1st season goodbye.