i get a lot of traffic when i submit to stumble...u can check initial posts at my blog
http://bloggingtruths.com
They r quality traffic..i mean they are experienced man..article readers etc but never click on ads or spend much time in your website as always they'll have next site to stumble so generally they r in hurry...
every page i subit to SU that page gets 100 hits & more if niche is blogging...