In this video I am comparing Borderlands performance between a PS Vita running default clocks without Amphetamine and another Vita running at a boosted 222 MHz GPU clock rate with Amphetamine. As you can see, the camera pans MUCH smoother on the overclocked Vita compared to the Vita running stock 166 MHz GPU clock.
Both Vitas are running 3.60 with the latest version of Henkaku installed. Borderlands 2 is running on patch 1.07.
This was a very quick test done to demonstrate video proof of the effects of overclocking to YifanLu, as requested on Twitter.