GeoTracker wrote an answer about Petzl Ecrin Roc Climbing Helmet on October 15, 2010
The suspension and as result helmet sitting high, is by design. This is a hard shell helmet so you need that gap to take a hit to the head. If it wasn't there you'd have to absorb that energy with your skull or neck.
Other helmets on the market have foam inside them to absorb the energy. For this reason the Ecrin Roc is better in my opinion. The foam will degrade and you will lose protection over time.