"Misinformed?" It's a political speech, read off a teleprompter. Deliberately misleading is more like it. Neither candidate was all that accurate in their speeches, though by my reckoning (fueled by the thoroughly nonpartisan factcheck.org), Obama was somewhat more accurate. In any case, speeches should only be a reflection of what a candidate wants to emphasize, not what their actual policies are. Obama, for instance, said he'd balance the budget mostly by closing corporate tax loopholes & tax havens, but in reality most of the money comes from greatly increasing taxes on the wealthiest individuals ($250,000/yr is the lower threshhold). Now, that shouldn't be too shocking; the majority of that increase is just from taking back Bush's tax cuts, so don't cry too hard for the rich, but make no mistake, soaking the top 5% is integral to Obama's fiscal policy.
I thought McCain's speech was really very good, which scares the hell out of me, frankly, because I don't want 30+ years of an activist conservative supreme court majority. Couldn't stand Palin's speech, or her record for that matter. Frankly, she's a hell of a lot closer to Bush than any of the Republican candidates were, and that scares the hell out of me. McCain, I'd say more likely than not, would revert to his senatorial beliefs on Bush's tax cut, immigration, and the other things he's changed his position on, and that's a good thing in my book, but Palin? Just about everything bad about Bush, with the exception of the silver-spoon upbringing, is bad about Palin. Well, let me limit that to domestic policy, since she's still blank slate on foreign affairs.