That doesn't sound right to me. I mean unless your on some 160+ cm stiff assed cambered deck. Even then, I would think more speed would give you more inertial "weight" so to speak to flex into the sidecut/edges when turning. I would suspect it is likely more of a technique/skills issue myself.
...but then I'm still pretty new to all this myself, so I'm no expert. Just my first impression of what I would expect. What size and profile type is your board?
Yeah see I agree. It felt like an excuse to me, which is funny considering it came from him and not me. I know I'm a beginner and definitely am working on my technique/skills which suck, but learning anything new takes time. I'm probably just not comfortable with speed yet.
I'm on a 148 cm board, and I have no clue about its profile. It's a Ride Catalyst (with Flow bindings) from like 03-04 maybe if that helps any.