Yup - as mentioned, part of Lee's act is the self-deprecation and deliberate pseudo intellectualism - pretending he is more serious than he is. Many other comics (including Herring) also joke about the fact that Lee's routines often deliberately go on far longer than you would expect .He's great value but takes himself way too seriously but that's half the fun for I'm sure. I'm more of as Richard Herring fan nowadays though.
I'm also more of a Herring fan, and I do commend the Richard Herring Leicester Square Podcast which has some truly excellent interviews. Favourites include Stephen Fry and Brian Blessed, Stephen Merchant (just for the awkwardness factor - it was a bit of a Clive Anderson Beegee's moment). Don't skip the people you haven't heard of as they can be funnier than some of the ones with people you *have* heard of.