I just installed a new front wheel and Avid BB7 brake on my utility hauler bike, which already had a Nashbar rigid fork with disc tabs on it. I went to my LBS and asked for compressionless brake cable housing, but they didn't have any, so I just got 3 feet of standard spiral brake housing. Now that it's all installed the lever feels pretty spongy, and in fact I can touch the handlebar grip with the brake lever if I pull hard enough.

I've heard that compressionless brake housing is supposed to be great for mechanical disc brakes. Of course I wanted to hurry up and get it set up which is why I just used the regular brake housing in the first place. So will it make a noticeable difference?