Downhill an Int 14 has its bow lifted by the kites. As do other skiffs.. Have a look at the 12s where they bounce down hill almost on their sterns with no wings..
At the top mark one doesn't have time (well I didnt) to tip the rudder, vang raise the plate and get set.. One has enough time to vang off while the crew pulls the plate.. get back and bear away.. Even then one bears off really when the kite goes up..
When the kits is up I would guess the lift by the kite is a 70 kgs or so..
The issue comes when one is jumping waves.. If the third or so wave is bigger you snuff the bow. Or the waves and the bounces are out of sequence and one lands in the trough and not the top of the wave.. If the kits remains full the lift pulls the bow out and up.. If not you swim..

I do know however the fleets here are probably more experienced than the UK fleets.. So maybe that is a factor?