You are 100% correct. But the problem is defining effective communicator. Bush certainly was not, but by what defining point declares Obama as a effective communicator? Is the constant use of the word uhh allowed?
That's funny. You're acting as if Obama is an ineffective orator. I mean seriously? That's funny right there, but then you're presenting as evidence the use of the word "uhh" as proof. Now, I may agree that Obama's otherwise silent pause would be better unheard, but your argument is foolish at best.
I get the feeling you're making this argument more because you don't like Obama than based on logic or reason. Clearly, you've never listened closely to Obama when he's talking free of a prompter. Did you not watch the debates?