According to Gallup, anyway. It seems John McCain is hurt more by his age than Barack Obama by his race:

According to the new poll, 23 percent of Americans say McCain’s age — he’ll turn 72 next month — is likely to make him a less effective president were he to win the White House. That compares to only 8 percent who said Obama’s race would make him a less effective president.

Overall, more than 8 in 10 Americans said Obama’s race would make no difference in his effectiveness in the White House while 65 percent said the same about McCain’s age.