Mike,
As you mentioned there are almost no push ups that are bent around Atlanta. This is an absolute record year for heat and temps above 90 in our area. I believe I saw where this year had seen over 680 hours of temps above 90 which is more than double what we have averaged for a decade. This record summer follows a record winter which saw more hours below freezing than ever recorded.
So you have a combination of record flooding in the fall, record low below freezing temps this winter and a terrible wet, cold spring and now a record June and second hottest July EVER! Indian Hills is the only bent push ups I know of and 10 of their 27 greens are temps right now.
Many courses that are "USGA" or "close" specs are struggling but that usually means stressed (not dead) and 2-3 temps per 18 holes. My course has one temp right now and had three more but that was due to a spraying error. Had that not occured, I think we ould have had no issues at all.
Of course, this has been the summer for bermuda and whoever has it looks pretty smart right now
Of course, bermuda is not a perfect, bullet-proof option and some courses have shade issues that can't be solved (Country Club of the South) is re-grassing with bent as there are so many surrounding trees at so many locations and the trees are on neighboring property that they cannot touch makes bermuda an impossibility.
I had Dr. Elsner come and do light studies for our greens and Pat O'Brien has already been out to see if bermuda is even an option for us. I am still convinced that in a normal year (and a "normal" or average July for Atlanta is highs of 88-89 and lows of 68-69) bent grass can provide an excellent surface from around Sept. 15 through june 15 and you will have to play "defense" in the summer which should still mean smooth ball roll but slightly slower. Bermuda has many advantages but if your busy season is fall through spring it is not an obvious choice either way. Also, many people hate the texture of dormant, painted bermudagrass from late fall through early spring.
Anyway, I think the "push up greens are doing better than USGA greens" statement may be a little misleading
I was up at a mom and pop course in Waleska that has push ups and the two greens I saw (18 and the practice green) certainly were as stressed as anything I've seen around Atlanta.
PS As you may know, David Stone is re-grassing November 14th and he is hoping the board will consider looking at bermuda! I think his place would be the perfect application for bermuda but as you know, that place ain't no country club, and there ain't gonna be any voting
Lastly, I wouldn't make any grassing choice based on one very unusual year of weather. FWIW