I tried VW North Scottsdale as well, not specifically Tukk though. That was a mistake, $32k OTD LOL. Literally $3k higher than anyone else. The guy did everything but call me a liar when I said I was seeing $5k+ routine discounts.
Tukk is the "rainmaker" of the dealership - I saw their scoreboard once and he was WAY out in the lead in number of cars sold. He seems to work a crazy number of hours and is the kind of guy who just wants to get the deal done.
That's great that there are finally 2 dealers in Tucson. Good to know. By early next year I'll be living in Hereford, about 80 miles to the southeast, in the middle of nowhere - Tucson will be my nearest major city for just about everything. I have always had good experiences with Chapman BMW & VW in Chandler/Scottsdale, but have heard bad things about Chapman in Tucson in the past.
At this point, I'd wait for an '18. Yes, the discounts will probably be minimal at first, but that won't last. Once the '17's are cleared, they'll have to start discounting '18's to move them.