I hadn't played with Google Scholar for awhile, and it seems to me, since the last time I poked around, there are a whole lot more JSTOR articles that turn up now. Maybe it's just English journals which were added: stuff like The Review of English Studies, and American Literature.
A quick check brings up 936,000 articles with "jstor.org" in the link URL, but there are 1,050,000 with just "jstor." (Is my syntax screwy?)
Am I wrong, or is this a (relatively) recent development? When did all that juicy JSTOR goodness get added, and where was I when it was announced?