JD, I could take a stab at answering your puzzle, but instead I hope that Bob Dancer turns this into one of his weekly LVA articles.
From: john.douglass@yahoo.com
Thanks, VVPP! You are right about non wild card games surpassing wildcard games on progressives; thanks for pointing that out. I was not aware of that, and it wasn't initially intuitive to me - I figured the rise in EV was the same for all games. Buzzz, wrong! Lol
But looking at the royal cycles as the meter rises, it becomes apparent that a wildcard game like deuces wild has a longer royal cycle than a non wildcard game. This must be due to holding the deuces and holding for wild royals etc rather than just natural royals.
For bonus deluxe, the crossover point is 5,488 coins, and the royal cycle is only about 34,347 hands, while for NSU it is about 39,952 hands.
For the machines in question, the royal does get above 5,488 at times, in fact it was at over 5,700 last week when someone hit it (not sure which game they were playing at the time). So bonus deluxe is a possibility at times, although somewhat rarely.
For jacks or better, the crossover point is almost 1,000 higher at 6,461 coins, with a royal cycle at about 33,134 hands, while for NSU it is about 38,706 hands. I heard from a slot person that the highest he's ever seen the royal is 7,000 coins, so it would be rare that the EV for 9/6 jacks surpasses NSU, and it still wouldn't be a higher EV than bonus deluxe.
Advanced Puzzle: why does the EV for 9/6 jacks or better rise faster than 9/6 bonus deluxe for the same increase in the royal flush?
For example, at 6,000 coins, the EV of 9/6 jacks is 100.6513%, an increase of 1.1074% from the reset at 4,000 coins and 99.5439%. For bonus deluxe, at 4,000 coins reset the EV is 99.6417%, while at 6,000 coins the EV is 100.7374%, an increase of 1.0957%.
[Hint/Part 2: why is the royal cycle lower for jacks or better than bonus deluxe, when the only difference is the payout on quads and two pair?]
[Hint hint/part 3: do strategy differences perhaps affect the royal cycle?]
JD