Today we reached revision 8000 of the HTML standard. We started tracking revisions in March 2006, about two years after we started work on HTML in the WHATWG, which itself was about 6 months after we first started the work on updating HTML (when we first started, we called the work "XForms Basic", because we were trying to show that you could do much of what XForms did, by just extending plain old HTML — that work eventually made it into the forms section of the current HTML standard).
That's an average of three checkins a day, every day, for over seven years! That's what progress looks like. :-) Some checkins are trivial one-character typo fixes, some, like today's r8000, are big multi-thousand-line diffs (r8000 integrates the new <template> element into HTML, based on a proposal by Rafael (of Google) and Tony (of Microsoft), and implemented already in Chrome and Firefox).
As of right now my metrics tell me there's 1199 feedback e-mails remaining to process, and 156 bugs. So still lots of work to do.