Bounce? What bounce?

For all the hype surrounding last weeks Democratic National Convention, Senator Obama doesn't seem to have gotten much of a bounce in the polls.

A CNN/Opinion Research Corp. poll, conducted after both the conclusion of the Democratic convention and the announcement of McCain’s choice of Sarah Palin as his running mate, shows Obama/Biden leading McCain/Palin by just one point, 49% to 48%, a statistical tie.

The latest Zogby Poll, also conducted after both the conclusion of the Democratic convention and the Palin selection, shows McCain/Palin ahead of Obama/Biden 47% to 45%

The Gallup Poll, begun on Thursday, before the end of the convention and the Palin selection, and then continued for two days after those two events, has Obama up by six points over McCain, 48% to 42%.

The latest Rasmussen Reports shows Obama with a three-point lead, 47% to 44%.

I doubt if a very slight lead in three of these four polls and trailing slightly in the other one is where Barack Obama hoped to be three days after the Democrat convention.