^^^^There are more than two 5x5 routines in the world
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Sounds like his program is an intermediate/advanced intermediate routine. BTW, simmons, 90% is a little high on Thursday. If your going to go that heavy you may as well go all out and just load it a la "advanced 5x5. Although I have no clue as to what you're doing in your whole routine.
I agree that your squat gains sound like "newbie squat gains" but if the 20 reppers helped then good deal. I think whether you are able to realize significant strength gains out of it simply relates to where you are in your training.