You have heard correctly. I have seen a stock Savage .21 clocked aroun 33mph. I say around because even cop's radar guns have some margin of error. The .25 should go a bit faster due to bigger engine, gearing and improved pipe.
My question for you is why the interest in the speed? If you wanted fast, you should have gone with a buggy, stadium truck, or better yet an onroad car. Savage is built for bashing, abuse, and all out fun. It is swift enough to allow you to do all of that.