I think so too - it was the same at Queens, where he often won his first match and then lost in his second or third match. The transition from clay to grass must be difficult but in a slam I doubt he'd lose a set to Kohlschreiber - same as Andy probably wouldn't drop one to Mahut either.
Agree. Both seem like strategic losses to me. I mean how often do you see both Andy and Rafa going out in the first match in GSs? Almost never. And Wimbledon is almost around the corner so who can blame them?
As to transition, I am sure it's hard but both Nadal and Nole skipped tournaments before Wimbledon just last year, but that didn't stop them from making the final. Great thing about being a top player is, they don't get very difficult first round matches in GSs, so with relatively easy rounds, they get the proper warm up they need. In the 90s though, this would have been a very difficult transition, as the surfaces varied considerably but nowadays, the speed of the surface is almost the same, so the transition isn't as difficult as made out to be.