Good points about the Gasquet vs Simon matchup.
Lenders trying way too hard at this, as if everything can be explained in tangible things. Again, he is giving technical aspects way too much credit in several matchups. The mental gain/loss between two players explains much of the lopsided H2Hs here. Not saying there technical aspects of a player's game don't dictacte a H2H, but certainly much should be attributed to mental strength, and not to mention surface variation.
Most things can be explained by technical aspects though. For instance, would you say Federer's mental issues against Nadal are not more important than the matchup issue. If anything, they're a result of it. Federer can't play his normal game vs Rafa, who always makes him uncomfortable on court, and that plays with his head of course.
By the same token, Berdych doesn't have mental issues vs Nadal just because, he has them because Rafa crushed him time and time again even when he (Berdych) was playing well.
Surface variation could be an issue (although surfaces are more homogenized than ever before), but most of the matchups I've analysed are of one player completely owning the other across all surfaces.