g1smd - 12:42 am on Feb 17, 2011 (gmt 0)
So it's a great tactic _if_ you have major problems with it, but not otherwise.
Until you press the button to find out how many and what type of errors you have, you'll have no way of judging whether it's an issue or not.
There's another effect, unmentioned so far: the effect that thousands of errors have on the error correction routines inside the rendering engine of the users browser.
I'll really like to hear from the designers of those systems, as to how much the browser rendering performance degrades as the number of errors increases.
There's a number of sites that barely load on my netbook: some of that is down to ajax code bloat, but in several instances the sites also have thousands of HTML errors on every page.