I find it immaterial considering the easier thing to speed up is the number of HTTP requests on the site, and that has clearly gotten worse over the years, not better. I pushed heavily to get HTML cleaned up and valid (showing an easy 10-20% reduction with HTML alone), reduce the amount of javascript, etc. It simply wasn't a priority. To be fair, at the time I was there the priority was to grow as fast as possible and deal with profits later.
I find it immaterial considering the easier thing to speed up is the number of HTTP requests on the site, and that has clearly gotten worse over the years, not better. I pushed heavily to get HTML cleaned up and valid (showing an easy 10-20% reduction with HTML alone), reduce the amount of javascript, etc. It simply wasn't a priority. To be fair, at the time I was there the priority was to grow as fast as possible and deal with profits later.