I've had these same tires on for 2 years now, and yea, they've held up well even with 90% of my use strictly on asphalt. When they were brand new I broke them in on Triathlete's annual camping trip where we did do some moderate trailblazing and crawled over a few relatively easy trenches and logs and (big) rocks and stuff--and they were great.
But yes, quiet, and good on wet roads/freeways. (Yes, I'm in San Diego; but when it rains it DOES pour!)