Not really. Although I do take a bunch of skill modifiers from intoxicants like everyone else.
But I don't think our attributes really change; instead, we get more and more larger and larger increasingly complex circumstance modifiers to different sets of skills as we age. For instance, I now get +1 to all Cha-based skill checks with devout Christians to go with my +2 when conversing with the politically active. Of course, then there are the the opposite sorts of things like -2 to all Dex-based skill checks when more than 10' from a stove which stacks hideously with the -2 to all Dex-based skill checks when being watched.
I have definitely felt myself level though. I recall leveling during a radio debate nine years ago; I distinctly recall the moment when I went from Scholar 1/Politician 2 to Scholar 1/Politician 3. I got a new feat and everything. Or maybe it was a class ability.
I recommend against the class, though. You're far better off taking levels in Rogue and then switching to the Politico PrC when the time is right. You get way faster Sneak Attack progression that way.