I'd hesitate at calling AdWords an auction. It is a non-transparent black box process, some aspects of which are auction-like. (And I like Google.) If it were an auction, the highest bid would win every time. That is catastrophically untrue with AdWords -- quality score, account history, Google's desire for variety, and a few hundred types of secret sauce mean that lower bids routinely float over higher bids for the…
Aside from the lack of full transparency, are you saying that generalized second-price auctions are not really auctions or that auctions with reserve prices are not really auctions?
Compare with eBay, a true auction:
Single bid at 5 cents, hidden reserve of $1 (eBay): no sale takes place.
Single bid at 5 cents, hidden reserve of $1 (Google): no sale takes place.
Single bid at 5 cents with maximum bid of $1, hidden reserve of $1 (eBay): no sale takes place.
Single bid at 5 cents with maximum bid of $1, hidden reserve of $1 (Google): sale takes place at $1. (I think almost nobody knows this happens.)
Two bids of 5 cents and $1 (eBay): the bid of $1 wins.
Two bids of 5 cents and $1 (Google): the side who Google says wins, wins, at a price which is somewhere between 0 cents and $1.