Benard “Pretty” Purdie has indeed always remained adament that he added drum sessions in the USA after the initial tracks were recorded in London, not just for the Beatles but many other artists. He is quite simply one of the most recorded drummer ever.

Ringo was never a fantasic drummer, but he was LOUD, which was much needed when the Beatles were playing to thousands of screaming fans on shitty PA systems.. he could hit dem skins hard!

for evidence of the Benard Purdie Beatles sessions and a very interesting conversation with Egon (Stones Throw) and David from the Red Bull Music Academy in Rome during October last year, check here:

http://www.redbullmusicacademy.com/DAILY_DIARY.18.0.html?act_aced=112&act_dpid=65

the files play in realplayer...
peace.