Same here, it didn't detect some of the things it should have (theoretically?), e.g. AdBlock plug-in, Twitter & Co., and the EXIF data wasn't fully exposed. The geo location was wrong by some 70 miles, but that's a question of a proper geoip database I suppose.
I don't think it's possible without user's permission, so no it's likely one of those public GeoIP databases which are usually a bit behind, inaccurate and incomplete.
Hmm yes, quite odd. The first time I loaded the site, nothing appeared in the location area, leading me to suspect that it was abusing a prompt-less device location API.
After your comment I loaded the page again, and sure enough it shows a very specific, but quite wrong location. Wrong province wrong.
I actually got better GeoIP results than that (down to the local city) on my old broadband connection. I just tried it now (we moved 2KM and changed ISP, from DOCSIS to ADSL) and all I get is the country now - possibly because its dynamic whereas our DOCSIS IP never seemed to change.
So it's kind of creepy on Google's part that they even offer this service, but the data seems to be so woefully useless that I can't believe anyone would actually use it.
All in all, not very spooky with Safari at least.