Federer won 3 out of 4 slams from the 2009 French-2010 Australian and nearly the 4th for a non Calendar Slam. Not prime my ass.
And prime Nadal is FAR superior to Federer on clay, another league superior. Nearly all of their clay court matches since 2008 have been straight sets for Nadal, and their biggest clay court meeting was an epic beatdown, the biggest humiliation of a #1 in a slam final since your beloved Seles got ***** on Centre Court by Graf in 92. Federer cant even be competitive with Nadal on clay anymore unless he gets Nadal coming off a 4 hour marathon the day before like Hamburg 2007 and Madrid 2009. Otherwise he doesnt even get sets anymore.
If you watch Fed play and know anything about tennis and compare his level to 2006, he is not at his prime. You are a ****** for even alleging so. The only reason Nadal has any slams off of clay is because Fed got mono. No mono and Nadal would be a one surface wonder.