Ashish wrote:

I'm just a bit queasy about time spent model. With modern browsers offering advanced features like tab based browsing et al, a user like me just prefers to open a new tab instead of navigating away from the page. Which does not capture the time spent correctly.

Also, lot of content consumption in blogs etc is through RSS, and which again means that amount of time spent is equivalent to the time taken to leech the feed xml, which again is false variable as i spend reading them in thunderbird for long.

I agree to one point that different websites serve different purpose and cannot be classified with a single performance model. I am working on to get some modeling done for my favorite blog reader for filtering feeds.

Loved your earlier posts as well, keep it up!