sublime1 - 3:01 pm on Oct 4, 2010 (gmt 0)
Data from several of my sites of which one has some rather significant performance issues:
1) typical page load times as reported by Page Speed Activity record all of the events (regardless of whether before or after onReady has fired).
2) PageSpeed times correlate very closely to page load times as reported by Google Webmaster Tools > Labs > Site Performance, which one might think is consistent with Google's view (just a guess :-) This report sometimes points out issues with specific pages and timings for them -- it is these times I have cross-checked with PageSpeed.
3) These poor-performing pages include a number of references to external resources, including Google Analytics, Verisign, and several others. They are being counted.