Did Apple change the signal strength scale with AirPort 4.2?

Since I am in a hotel room with a reliable, but fluctuating wifi signal, I can't verify this, but Avi Flax wrote in with the following:

"I just installed the just-released Airport Software 4.2 update, and after rebooting I noticed that Apple seems to have changed the scale that the Airport icon uses to display signal strength. Before reboot, the icon was consistently at 2-3 bars. Afterwards, it's steady on 4, which should indicate a 100% signal, which made me a bit dubious. I doubted that the software update would have improved signal that much. So I launched the always-handy APGrapher, and verified that the signal strength hadn't changed at all, and was still around 40-45% – a far cry from the 100% that the Airport icon now implies.

This doesn't actually bother me or anything, I just think it's worth noting. It reminds me of automakers removing oil pressure gages from car dashboards because of people worrying about their oil pressure, or making engine temp gages stay in the middle except in the case of emergencies. These changes were only made possible by engines becoming much more reliable, so wireless technology may one day be able to eliminate signal gages in the same vein."

Can anyone else confirm this behavior?