Gwen's boost in strength was exponential. And she could tell immediately once Zane had applied the upgrade. She was smarter, stronger, faster, wiser, and tougher. If she was superhuman before, then it was hard to find a word that accurately described her abilities now.
And of course, she also had the advanced set of equipment that Zane had spent a fortune upgrading to be appropriate for her level. If she were to fight with a lower ranked Tier II Horde King, then victory was most certainly assured.
Especially with her new skill. Which she could activate upon instinct. Hell, with a 25% additional speed increase, a 45% increase to the chance of a critical hit per strike. She might very well be able to take down a mid-ranked Tier II Horde King in a one-on-one battle.
Naturally, she couldn't help but express her joy towards this, and the man responsible for her sudden growth. Which she did by hugging him.