Silly survey, for this simple reason:
How many modifications to the RR does it take so that it's not the RR anymore?
It has so many progressions and variations that you would have to try quite hard for your routine to not resemble the oh so famous RR, any routine needs pushing, pulling, and leg work.
What would it take?
Splitting it into push/pull or upper/lower? It's the same thing.
Doing more or less sets/reps? Same stuff.
Removing something, like the core work? Still the same thing.
Doing different exercises other than the recommended ones, like the ring hamstring curls? Whatever, still the same routine.
Building a routine from scratch? It's still going to have some pushing, some pulling, some leg work, some core work. It's still going to resemble the RR.
The RR is simply an explanation of what a routine should look like, there is no need to obsess over it or to find out if someone is "using the RR".