Interesting site, but while Panasonic do both LCDs and PDPs, they don't do very good LCDs.
With the latest LCDs, you can have a 45 degree change in angle with no picture degradation whatsoever (S-PVA panels) but Panasonic doesn't use them.
Response time isn't an issue now - the latest panels won't smear 99% of the time now - however there's still the sample and hold effect going on with LCD because they don't flicker like Plasma. If anything Panasonic's plasmas are worse for motion than LCDs because their consumer products are forcing some sort of adaptive noise reduction on analogue SD inputs, and when it kicks in, the images smears worse than any LCD I've ever seen, but only for a second or two most times. You don't get green trailing and blue/yellow flashes with LCD and motion though. Not to mention the dithering with fast-moving objects.
No argument about colour reproduction from me though - Plasma wins hands down here, it's better than CRT even. LCD is getting better, but it's still playing catch-up. (I've not seen Sharp's 5-wavelength backlight solution though - Sony's WCG-CCFL is good, but has issues with accuracy, especially with reds)
I'd also disagree with the brightness/lighting argument used on the site. In anything other than a totally pitch-black room, the current LCDs look better than Plasma. If there's a light on, you can't tell if the Sony V series is turned on or off, if you've got a full black image onscreen. When you've got a light on in the room, Plasma blacks turn grey. In a dark room, there's no contest, but you've still got the dithering to deal with on plasma. (which can be quite noticeable at times)
Both technologies have their problems - I would base my decision on whether I'd be viewing in a totally dark room, or not. In a bright room, there's no contest, LCD is far better.
It all depends on what matters to you most about image quality though. Some people aren't bothered by (or can't see) the green trails and blue/yellow flashes with Plasma, others are more bothered by the "sample and hold" effect LCD has.