According to this article, HubPages gets over 8 million unique visitors each month. That’s a ratio of 8 million/200,000 = a ratio of 40 viewers per hub. While Blogger.Com, it's ratio is less than 3.1. WordPress about 25. Squidoo.com about 12.2 visitors per lens.
I don't know Squidoo, but I can feel Wordpress is really better than Blogger in terms of community sense, both in hubpages and wordpress, you can easily find relative posts, socialise with your neighbours, but in blogger, until the recent "follow this blog" function, the only way to find you neighbour seems the "next blog" arrow on the top bar of your blog, most probably you will run into some other language blog, Chinese, Italian, Spanish, Arabic, Urdu, etc.