I've not had any problem with oil surge since cutting the sump down. I can only say what my experience has been, which has been spirited road driving (that is to say quick enough to squeal the tyres as the car tends to lift a wheel on cornering)
I fitted an Accusump to the car to control oil surge, but its not actually kicked in as the pressure has never dropped that low
So a rather expensive and heavy backup system. Whether it would drop low on a trackday, I couldn't say.