How important is YSlow Score?

My personal pet peeve: blog.yoursite.com with no link to yoursite.com.<p>Extra bonus points for this one having a name so bad that typing it into a new window while reading the original landed me here instead: <a href="http://yotta.com/" rel="nofollow">http://yotta.com/</a><p>As to the service itself, it will be wildly inaccurate for anybody running on Cloudfront or another CDN that allows using CNAMES so that img.yoursite.com is served from the CDN. I'm curious to hear their plans for dealing with that.

When your service collects YSlow data, does it take into account CDNs with custom CNAMEs? YSlow gives me an artificially low score for my sites until I go to Firefox's about:config and add my own CDN CNAMEs to the list of known CDNs.

Nice methodology. What I'd be really interested in seeing is how these numbers impact traffic or conversion rate.

I gottaa a yottaa score of 63 for a site - YSlow plug-in for FF3 gives me 98 using the blog config and 89 using the regular V2 config (brought down by not having Facebook listed as a CDN).<p>Edit: hang on it's going up and down a bit, it's at 65 now (giving YSlow score of 83) didn't realise it was going to be dynamically updated. Actually looks like a good site speed summary.

I like it, but it took 13 minutes to get a score. I also inadvertently visited yotta.com (misread the domain name).

I got a score of 0 from your site, but YSlow on my browser gave me a 74. Hmmm is the analyzer slow right now?

I just ran a website I administer and I've been waiting for a few minutes for results. How long should it take? When I hover over the rolling progress bar icons, a tooltip reads "Coming soon..." and I don't know if that means my results are coming soon or the <i>feature</i> is coming soon.

Like several other people here, this website doesn't work for me. Just sits there "forever" with a score of zero. Refreshing the page doesn't help. I suspect it might be in my case because I entered a HTTPS url?

The average YSlow score for all sites is 69. Wah. Higher than I expected!