In NCE, Bulging Biceps gives you +1S, while also raising your cap.
So yes, in melee combat, a fighter with a normal Strength advance and Bulging Biceps would hit at S5, not taking weapon into account.
Come back to me when you have to face a S6 T5 Scalie with 2+ armour, Nerves of Steel and the old Juggernaut rules.