indyank - 10:29 am on Feb 18, 2011 (gmt 0)
From what I've seen, it doesn't matter with regard to the Google changes whether the onpage text is in hx headings or not.
What you have explained is what it was until now.The current tweaks however, are impacting elsewhere too, but I am still not able to see what they are trying to achieve with this.This could be a temporary one and they are in the middle of changing something or it could even be a bug.
This is the example.
I search for a domain name (without the tld).I get the home page and a few other pages from that domain listed below it.One of the pages gets assigned a (h3 tag + "- domain name") as title to it! This h3 tag has one keyword.
However, this page usually appears in the SERPS for other keywords too! When I do the search with those, I see the SERPS listing the page with the proper title.
So, it doesn't affect traffic, but it is strange that google chooses to use the h3 tag as the title for the page, in the SERP listing for a domain name search!