I noticed on steveg's stats pages that Andy has the 5th best winning percentage out of all of the top 20 players this year, with W 43 L 14 for 75.4% - the win percentages up to 5 November can be seen in order below, with current ranking also shown.

Although win %s can be affected by lots of things like how strong the tournaments you entered were and how lucky you were with draws (though the latter also affects the rankings of course!), this does add some fuel to the argument that a fit Andy is already good enough to be one of the world's top five players.

Won more than 3/4 of their matches

88.9% Federer 1
84.0% Nadal 2
81.0% Djokovic 3
78.5% Roddick 5
75.4% MURRAY 11

Won more than 2/3 of their matches

72.2% Ferrer 6
70.3% Canas 15 - includes Challengers, so perhaps artificially high
69.6% Haas 12
68.6% Baghdatis 16
68.6% Gasquet 8
68.5% Youzhny 19
68.4% Blake 13

Won less than 2/3 of their matches

65.7% Berdych 14
64.9% Robredo 10
64.7% Ljubicic 18
64.6% Moya 17
64.2% Davydenko 4
63.3% Nalbandian 9
62.1% Gonzalez 7
61.5% Chela 20

Other interesting things to come out of a comparison of the positions in this table with the actual rankings are that playing a lot of tournaments clearly has quite an effect - e.g. Davydenko is ranked 4 despite being only 17th in this table, which really surprised me because if he plays in more non-GS/AMS events than anyone else, you'd expect him to have a higher win % because of the weaker average standard of his opposition if anything.

It's also very clear from this that the ATP ranking system massively favours those like Dammit (Gasquet), Gonzo, Numpty (Nalbandian) and perhaps Berdych too, who play like muppets most of the time but reach finals and win things when they happen to have a good week over those who are much more consistent (e.g. Haas, Youzhny and to some extent Andy) but haven't tended to reach GS/AMS Finals.