5x5 is originally a Bill Starr strength program...but like most strength programs it turns out to be very good for hypertrophy also.
Strength and Hypertrophy are completely interrelated, and as long as there is enouhg volume (total reps) and enough calories, stregnth increases will result in hypertrophy. Remember, the muscles only hypertrophy in order to increase fiber size and cross-section area, which has its entire purpose in creating more force (strength).
Of course SST (strength-specific) utilizes neural increases in strength (increased rate-coding and efficiency) as well as hypertrophy. While HST focuses purely on the hypertrophy effect of strength-training.
I have never seen a man with small, withered muscles deadlift 700+ lb.s....ALL STRENGTH TRAINING IS GOOD FOR SOME HYPERTROPHY AS LONG AS VOLUME AND CALORIC INTAKE IS SUFFICIENT.