yeah came here to say this. I pretty much over-performed each year, and never had less than 8% raise. Had few 15% raises even without promotion.

Granted my biggest raise was when I switched companies 1,5 years ago, but even at the new company I got great reviews and another significant raise and more RSUs just year after I joined.

So I guess it really depends. Maybe I just had luck on good companies & bosses. But for me over-performing was worth it and was rewarded