week 6, #14 Technorati

I looked at technorati and did the advanced search "learning2.0", and found the results are different. Under keyword search the results are 143, under tags the results are 120, and under blog directory the results are 116. I was just wondering why the blog's result is less than tags? I also viewed the "popular" , the Top favorite blog #1 is Boing Boing (2887 member have made this a favorite). The top blogs #1 is Engadget, on this blog I found some Chinese reactions. It is very interesting.