that happens to me.
I'd guess its pretty common without out the stabilizers.

 

i get wheel jump sometimes but thats only when i engine brake... my front wheel feels weird when i down shift at high speeds to a lower speed

 

Never had any problems with my bike, had it up to 210 kph (130ish mph) & that was with both of my rack bags full of gear. Had the front go light on me a few times, fanging over a rise, but all bikes will do that. But its one of the best bikes I've had for stability at speed (the other was my Guzzi). Lots of things come into play at speed though, tyres, spring set up & the road & conditions on the day.

 

Your friend is full of it.