Just added <meta name="robots" content="noindex"> to a bunch of pages. How long will it take before they're gone? The countdown starts now!
UPDATE 4/21/11
Well it's been a month. So far, Google has removed about 50% of the pages.
UPDATE 5/28/11
Been seeing some pretty significant drops the last few days. At this rate, shouldn't be too much longer before the pages are gone.
UPDATE 6/22/11
Three months later. Fifteen pages to go.
UPDATE 6/25/11
Nine pages to go.
UPDATE 7/4/11
Six pages to go.
UPDATE 7/7/11
Four pages to go.
UPDATE 7/16/11
Three pages to go.
UPDATE 7/17/11
One page to go.
UPDATE 7/19/11
And they're gone!
So it took just about four months to remove the pages.