Believe me! Obama is not leading in anything!!
The PEW poll actual release: http://www.people-press.org/files/legacy-pdf/02-13-12%20Final%20Political%20Release.pdf
There are some very interesting comparisons with historical data contained in this survey, and it is worth grabbing for that, I believe.
It worries me that Obama is above 50% at this time. A good thing is that Santorum polls no worse than Romney vs. Obama, though. Also, their finding of 26/32/36 GOP/Dem/Indy makes me hopeful that their survey sample is somewhat skewed even though they get roughly even numbers of Dem/lean/GOP voters in their “registered” voter sample. Also, that 26/32/36 is about the same as their 2010 numbers, which worked out just fine for the conservative candidates.