Roger Federer 2012: back to n° 1?

Roger Federer at the 2011 Australian Open
The Swiss wizard, at the relatively young age of 30 (born 8/8/1981) is arguably the all-time greatest tennis player.
In 2010 he surpassed Pete Sampras' record of 14 Grand Slam titles, winning his 15th Grand Slam singles title at  the 2010 Australian Open.
Since 2001, he won 63 major singles titles, with a career winning percentage (singles matches, main draw only) of 80,6% in 1051 games.
Pete Sampras’ winning percentage was 77,4% in 984 singles. Rafael Nadal’s is currently 81,6% but with far fewer games (762) than Federer .
One of the past greats, Bjorn Borg, has a winning record of 83,2% in 736 singles.
Federer can still improve his record and has a very good chance of topping this particular ranking soon.
But the current question is: Is Federer slipping some? He's currently n° 3 in the ATP singles ranking...the first time since 2003 that he' out of the top 2!!
With his current main rivals, Novak Djokovic of Serbia and Rafael Nadal of Spain, Federer's record is:
vs Djokovic in 2011: 4 losses and one win, string LWL
vs. Nadal in 2011: 3 losses and one win, string WLL.
In many ways, 2012 will be a crucial year for Roger F's career: will he bring his game to the nth level and get back to world n°1? For the first taste of the answer, see the Australian Open in a few weeks.