That looks a lot like when we were practicing in FLR and one of my friends on 3015 decided he'd try and play defense against us. He found out quickly that he wasn't going to win. We were still in high gear and were able to push them all the way across the field.
Keep in mind also, that a gear box with a lot of torque is great to push defense. HOWEVER if your wheels don't have enough traction they'll just slip and not be able to push. That is why the Vera Wheels from VexPro, with a gearbox that will make your robot have a lot of torque could push almost any robot. FRC team 771 played Defense against us in
Qual 81 at GTR west, them having Vera Wheels, were able to keep us pinned easily. (1:45 ish in the video)