and here are the rates if you use Chrome:
I found something similar and the Consumerist also reports similar results.
Price discrimination makes sense if Chrome users are better searchers, as seems likely. I suspect, however, that it is price experimentation and the Chrome<IE effect is being reported more often than the reverse. I cleared cookies and tried a couple of times and although rates varied the lowest rate was still with Chrome. I gave up after a few tries, however.