It may be that the difference between Wales being a mediocre side and their being a very good one is three or four players. Commentators have been getting their knickers in a twist about coaching, tactics and temperament - and they're all important. But sometimes it's easy to lose sight of the fact that players play rugby. The quality of performance can simply come down to who you have on the field.
Stuttering in defeat last week and comfortable in victory this: the difference being Mike Philips, Gethin Jenkins and Matthew Rees (and, almost unthinkably, was Warburton's replacement of Williams a net gain?).