most (not all, some contributions are QTVR-only due to historical reasons)
many, but depends on photographer's choice of file upload (newer event = more likely to work) and your device's capabilities. You may experience slow playback, distorted images or unexpected browser quitting if there is only limited memory/GPU power available.
I shot this scene for a printed pano (that I have at home now); but also viewed interactively it shows very well two opposing sides of civilization: Creation and destruction. Nature and construction: Without the road and required construction work I surely had never seen this place (and even more beautiful ones later that day up the road) but at the same time the beautiful countryside that you can see across the river had to be sacrificed to an extent.
Latitude: 46° 40' 6" N
Longitude: 9° 10' 54" E
Precision is: Medium. Nearby, but not to the last decimal.
Equipment: Shot with a Fuji S3Pro, Nikkor 10,5 mm fisheye and a selfmade panohead in Raw Mode. Converted with Adobe Bridge (PS Raw Converter). Stiched with PTGui/PanoTools/Enblend, retouched with Photoshop, converted to QT with PanoCube.
Exposure 1/60 s and 1/8 s at f/8