Yup,it wouldn't surprise me at all to see Fed play crap at Wimbledon this year after an excellent FO,the guy is old for a tennis player,not to mention that he's got quite a lot of mileage as well(his slam SF streak alone would took a lot out of anyone).People who just expect that given that Fed played great at FO this year it automatically means he would carry on that form to Wimbledon are wrong IMO,if he was 25 then yes you could draw such conclusions but today's it's anyone's guess which Fed will show up at Wimbledon.
I said this several times already but Fed was playing quite well at FO last year only to play terrible at Wimbledon after,keeping in mind that he also had more time to recover and prepare for grass given that he lost in QF to an inspired Soderling.His 1st round against Falla last year was one of the worst performance from Fed in a slam I've ever seen,it was not just a regular case of a top player getting pushed to 5 in early rounds,it was more like "Fed's a few points from a straight set beatdown at Wimbledon(!!!)" and there are still people who claim he's playing as good as ever,hilarious stuff.