Not specifically, as like the FAQ this only addresses past proxy bids.
Scenario:
4 people bid $8.88 for a domain - it goes to auction and the PinheadBob username is initially in the lead.
1) PinheadBob bids $50 in proxy
2) Later Pinhead Bob bids $100 in proxy just to make sure he wins
In both 1) and 2) cases, the original $8.88 auction price/bid should not increase (assuming no one else bids concurrently), right, and PinHead Bob should see $50 and then later $100 in the green proxy bid section while the auction price sticks at $8.88.
It's logical, but the FAQ only covers proxies made prior to the auction and as the losing bidder, not as the winning bidder, and as I stated earlier, I attempted to test the functionality on a live auction and got an error.