No and no. I'd like to think the guy that works the hardest wins, but as we know that's not always the case. Most of those guys buying 15 lb bikes refuse to actually train to the point they have single digit bodyfat percentages. They help some, but the results aren't going to drastically change either.
For reference, a few seasons ago I did the math and with a 300 meter run it to the finish an aero setup give you about a half a wheel advantage vs a non aero setup.