I wanted to mention the bench workout they have been doing in their workouts because I think it shows how he is getting stronger.
They have been doing 5 sets of 3 reps each. The weight goes up each set. For him his first set is 71% of his bench max, followed by a set at 80%, then 87%, then 90% and then the last set at 97%. That last set is within 5 pounds of his max and he gets the first 2 reps in with no help but the last one he said he had to have some help. I told him it seemed to me that if he could do that workout and then 2 reps just 5 pounds less than his max that his max must be higher now. He agrees but they have not done any max work lately.