Then I noticed this from the start of the article, "Like the small-town mayor who suddenly finds herself running an entire state, our ambitions for Stack Overflow keep growing."
I have a hard time finding that to be anything but a casual and not very detailed analogy. Sarah Palin -> lots of ambition::the SO team -> lots of ambition. How is it snarky? (If anything, he's comparing himself and his team to Palin, so how snarky could it be.)
You're overanalyzing, I think.
I just don't see the upside to bringing in such a polarizing political figure. Regardless of what you think of Sarah Palin, it hits a sour note to find her in a product pitch.
Having said that, the two other early responses to your post do suggest that you may be right about how polarizing Sarah Palin is.
(Unless, of course, you are pro-Palin, but I'm assuming because you are able to type that you are not).