Very strong.
So if squatting 585 is strong, even for IFBB pros, and if me squatting 385 for two reps at 170 before is "weaker than a 13-year-old" according to that weakling Walter Sobchak, then can we define where "strong" begins?
IMO, squatting 365 or over with good depth is ok, and anyone squatting 495+ should be considered "very strong", and is probably in the top 0.1% of squat strength.
I remember Ben Pakulski squatted 585 once, well above parallel, and Hany Rambod told him to put on more weight.
Kevin Levrone squatted 585 for reps way back in the day [around 1991], and that was extremely strong.
Even Ronnie Coleman's 800-lb squat was with the assistance of a suit, and would have probably gotten flagged for depth in a powerlifting meet. A powerlifter I know seemed to think Ronnie would have gotten 650 in a proper sanctioned meet. But he was a bit jealous, I think.
Either way, I think for IFBB pros, 585 to proper depth for reps is both very strong, and pretty rare.
Hollingshead is strong.