The warthog feels a little off I thought last night. It accelerates far too quickly. Once it gets to optimum speed it feels fine but the thing shoots off like a bat out of hell! Plus I feel the physics are too light when its in the air. Needs to feel heavier! Just my 2 cents.
I was just doing circuits around behemoth an hour ago thinking same thing, it does seem too light and definitely think speed should be balanced a bit more