Squidoo rankings are unstable. I created a lens on a decent long-tail keyword and it got to the front page of Google within 2 hours! Next day, nowhere to be seen and it's been ranking all over the place since. I think that HubPages could rank better because they have a hubscore system by where you need a certain score to get your links have nofollow removed. Squidoo, all links are dofollow so maybe the search engines prefer HubPages approach?