Obviously, all polls, at all times, should be taken with a grain of salt. When you have a flurry of polls at a given time all showing similar movement, they should be taken a bit more seriously than a single poll. However, that still is only a snapshot, and not a trend. Clearly we’ll have to wait to see if Fred’s anticipated announcement bounce holds. As for McCain, while people may question whether his upward momentum is statistically significant, there are at least some outside developments that you could point to that would suggest that there is more to his apparent bounce–notably, that the debate in Washington has shifted from immigration to Iraq.