I wound up playing instead of judging at a CC here so the Masters could have 5+T4 instead of 4+T4. I didn't have a deck, so somebody handed me their Shuppet donk deck and I used that. I didn't even look at what was in the deck prior to starting. Now, to be fair, I know how to play. It's not like I'm a total noob - I just judge instead of play in tournaments now.
Round 1 v Cursegar - T4 win (to be fair, he got nothing other than 2 'tombs and deaddrew, so this wasn't really a "donk.") 1-0. Turns played: 4
Round 2 v Gyarados - We played 4 times. I won the first 3 on the first turn - Unown Q donk of a karp, Uxie donk of an Uxie, and Uxie+Crobat donk of a carp. 4-1. Turns played in wins: 7
Round 3 v Gyarados - He Sablestarts with a benched 'karp. Impersonate Collectors for 3 basics. I Warp Point, Seeker, Uxie+PlusPower donk. 5-1. Turns played: 8
Round 4 v Machamp/Donphan - He wins the toss, starts with Uxie. I T1 donk his lone Uxie with my Uxie and PlusPowers/Belt. 6-1. Turns played: 9
Round 5 v Uxie Donk - He wins the toss, starts with Uxie. See Round 4 but add in Crobat Gs. 7-1. Turns played: 10
To be fair, I got demolished in the T4, by the guy I donked in Round 3. The point is, I took a deck I had never seen, didn't know the contents of other than the fact it was a straight up donk deck, and won 7 games in 10 turns. Since only 5 of the games counted, my rating after the Swiss rounds (start at 1600) was 1640.04.
Conclusion: the current rules set ABSOLUTELY allows completely unskilled players to beat on total expert players who never stood a chance in the game. And a ruleset that allows donks to exist in a single-game match ~and~ in an ELO system is completely absurd.