Always confuses me that one, but haven’t been nearly enough to know the truth.
There was always lots of club spiel that the concourses were sized for expansion, yet as you say some folk say they’re chokka. Equally others say they’re not and it easy to get a drink or scran if you move a bit further down to other outlets.
Having only been in the family enc so far, I must say that was sufficiently chocka at 1/2 time that I swerved the F&B outlets, but I only saw the one at the bottom of the stairs I came in from, didn’t even attempt to get through the crowd to see if there were others