I haven't implemented it on any high-profile sites, but the few blogs I've turned it on for have seen anywhere between a 95-100% drop in their commentspam count, and the sites seem faster, but we haven't measured, and the traffic generally hasn't been high enough to serve as a real test.
Still, it's worth signing up for a free account if you have any sort of self-hosted site or blog.
My experience so far is that it has made things faster. However, according to BrowserMob monitoring there have been several times during 1 day where my site is completely unavail.
[+] [-] ghurlman|14 years ago|reply
Still, it's worth signing up for a free account if you have any sort of self-hosted site or blog.
[+] [-] calloc|14 years ago|reply
[+] [-] newman314|14 years ago|reply
So YMMV.
[+] [-] prayag|14 years ago|reply
[+] [-] joshu|14 years ago|reply