TheBigK - 5:27 am on Nov 28, 2012 (gmt 0)
For the past 1.5 - 2 months, my routine is to get up in the morning, login to GWT and mark the top 1000 reported errors as 'Fixed' - then see the total error count reduce by 1000, 900 or sometimes 1100. I began at 99k errors and now at 50k. Google gave me two surprises in the last few days. On 26th, it dropped those errors by ~4k and by ~3k today. On 27, it followed the regular 1k drop, like all other days. The graph says it all -
I'm confident that all the errors have been fixed because I downloaded the error data through API (which allowed me to view all the errors in one go).
I think once the errors are cleared off, Google might take a week to restore our rankings. Would still look for ways to improve the crawl rate.