I checked your blog and don't see much there besides ''hello world'" "hello world"....and checked the PR myself and it was indeed PR3. Wth??
May be the domain he used is an old one which some one left after using it for some time and so if it is the case he may have some back links which were already existed in the web ,Those gave him a kick start blow by Google
submit-web-tool.blogspot.com i got PR-2 when after 15 days when i published my blogspot in december 2009, and its still same on PR-2