Comics Could Prime be having rapid aging?

Something weird is going on...by the end of Countdown he may have white hair! It could be a by product of the excessive power he's absorbed. Maybe its causing an 'acceleration' of his cell activity or something. Definitely something to keep an eye on.

And yes, he still whines too much. Why does he find it so easy to kill? For someone who styles himself a hero, it makes no sense.