In other words, she comes off as another boring politician. This would not create the excitement that WILL bring voters to the polls to vote for Palin. At risk of taking myself too seriously, mark my words.
The problem is that we're talking VP slot, not the top position. Your whole pizzazz in generating voters cannot be about the VP, or else after the introduction wears off, voters will still notice that they're electing someone boring.
It's best to embrace what you are-I think GW's success owed in large part to creating the impression that he was just plain comfortable with who he was, and that he didn't need to pretend in order to get up on stage and run.
Selecting a personality who is so far in contrast with the Presidential candidate only makes the lack of vigourous energy more apparent.
By foolishly attacking this perceived flaw, Obama and his media allies have drawn attention to Obama's even more glaring lack of experience or accomplishment, and for a higher office, no less. This has reduced Obama to claiming he has "executive experience" by virtue of running an election campaign.
You call it reduced, but apparently the polls are indicating that most people consider it to be either irrelevant or a plus. He is consistently up in the latest polls...we'll see in the next week how that fares with Palin's introduction and the convention.
I'm predicting, though, that the attacks will benefit Obama-he's managed to deprive McCain of the "no experience" hammer, because McCain picked someone without precisely the kind of experience McCain has spent the last few months emphasizing.
I think you'll see the opposite of Obama being reduced to making silly claims: McCain will be reduced to, in effect, equating his Senate service and military command to being a local politician, in order to explain why he chose Palin to run on the "experience" ticket. Those are the things that qualify him to be president, according to his campaign, and he's going to have a tough time explaining why he doesn't want a number 2 with those same types of credentials.
You are right in identifying a preference for Gubernatorial experience, but the problem is that Palin isn't running for President, so that dynamic isn't going to work. Instead, McCain still has to sell himself...and if he's out there claiming that you need a governor from outside Washington, how is he going to turn around and say "but vote for a veteran Senator from Washington now!"?
In short, everything that is good about Palin undercuts, literally, every argument that McCain has been making in support of his own candidacy. He's now going to be stuck trying to explain why those credentials are suddenly not so important...or he'll have to hope that people elect his VP, and not him, which is folly, imho.