I was actually interested in where Janab person got his info from. I know how how to conduct research, thank you.
^ comparing ppl in masjid at jummah time versus ppl in masjid at other times may give u some evidence
additionally comparing number of ppl out and about at jummah time versus at other prayer timeswill also supplement that.
PS: you are doing a good job of being a religious advisor, you got the attitude and approach completely under control. thumba up.