I was in the same boat and decided to buy a road bike. No regrets at all. Now I'm riding faster, it's easier to get moving, quicker up hills, and I went clipless. I think one of the big benefits is upgrading to a bike with quality, proper road gear like Shimano 105 instead of the cheaper MTB components that are on the hybrid. The difference won't be phenomenal, probably 1-2mph average at first... but I greatly prefer the road bike on the road now and the shifting is much smoother.