Submitted to stumbleupon and witnessed a sudden spurt in visits ? Don't get excited.
Though these visits add to your site visit count but they are not of much relevance. The spike comes and goes with the same good speed. Moreover i realized that the visitors don't even stay on site for long.
I am not sure but its very likely that all visits that comes with the initial spike comes from the admins / editors who reviews the content.
One get the real visits only when your link is referred by those admins. If you can see the url like www.stumbleupon.com\refer in your Referring url list , it means you will start getting real visits.
Though its just an observation , only stumbleupon admins can confirm this. Let me submit this to stumbleupon and see if they refer this too :P.
Follow us and we will follow you.
http://www.stumbleupon.com/stumbler/buggybread/likes