The Doctor does have some long speeches and he talks very quickly. Learning all his babble can take a while, but it's very well written babble so I don't mind and you do get quicker. When I filmed Recovery during the break in Doctor Who I would sit down at the weekend and learn the script in an hour and I was like 'Hang on??' You do get used to it though.

Davidtennant.com exclusive interview (February 2007)