An Unmeasured Metric?

I’ve noticed (casually – I didn’t run any numbers) that there are some blogs I can comment on or trackback to and I get a tremendous click back to my blog.  And other sites that have 10x the readers have a much. much lower rate of clicking back from a comment.

I wonder if it’s worthwhile to measure this?  I imagine it is – any new blogger that is blogging to make a name for themselves would like to know where to spend time commenting to have the best chance of increasing their audience.

For what it’s worth, I get a lot of click-backs on comments to TechCrunch and from Robert Scoble’s blog.  I get very little click-back from LifeHacker, yet people at BlogMaverick seem to click back pretty frequently. 

Is anyone measuring comment click-throughs?