Read the Fact Checkers Yourself
Politifact, Factcheck, Real Clear Politics.  Politifact was reporting during the debate itself, so it is ready to read now. Factcheck had not yet completed their analysis at the time of my posting.  The New York Times, again like after the first debate, provides a very detailed and readable fact checking of the VP debate that is well worth reading.  Real Clear Politics does not organize itself as a fact check site, but can be read to get that information. 

Biden appeared to have a much more sophisticated grasp of foreign affairs.  He called Ryan on several statements about taxes that lacked specifics and Ryan was only able to admit he does not have specifics and explain that this is because he and Romney plan to work in a bipartisan manner. 

Lack of specifics seems like a weakness to me, but the claim that Congressman Ryan and his House colleagues will be those interested in a bipartisan approach is contrary to what we have observed in the past three years, making the lack of specifics more worrisome.