I believe the EWR C-3 club won this award last year. It is certainly a very nice club, but obviously the PP folks did not evaluate the place around 5:30 on a Thursday evening...
The IAH-E club, in my experience, doesn't get quite as crowded as C-3 at EWR (or any of them, for that matter) simply because of the sheer size of the place. I do believe the food options could be expanded somewhat, perhaps in the evenings during the major transatlantic push at EWR some upgraded finger foods could be made available?
The Holideck at LHR is a personal favorite of mine, glad to see it on the list, and I am looking forward to using it when CO moves to T4 later this month.