OK, so I guess the only really important statistic is how long it took to hack each one? I assume they were at current patch level and default settings. It would be interesting to see how each did at full security.
The real point is that nothing is truly safe and browsers are being used all the time and will be hacked. The only truly safe machine is one that is disconnected from the network - trying to protect them will be semi-effective (unless layered behind several points of scrutiny by adept folks) and all take some of the speed away.