I mean, my star isn't giving big numbers, so you may go as "but SRK isn't able to do that", but Sultan numbers are overhyped, especially since we saw what the market potential is just few months later.
Sultan was obviously going for 180cr 5 days with release date it had, I remember answering the post you made or something like that. It was just like Bodyguard doing 85cr in 5 days in 2011 deemed as unheard when Dabangg had 81cr in whole week just last year.
Here Sultan did 185cr in 5 days, when Bajrangi did 181 in whole week last year.
The reason Sultan record still stands is more to do with no right film at right time.