I think people won't make up their mind until they either use the camera themselves or see some footage shot in very similar conditions they are used to.
So for you UW guys, you'll have to wait for the housing mfr's. Hopefully they release soon, I have a trip the 1st week of March.
There is a ton of topside samples being shown on the various boards and people are still debating.
All I can say, is when I compared my FX7 to my TRV900, the low light capabilites seemed very comparable. Naturally, the FX7 was sharper and the differences between the 2 are more apparent with better lighting.
Out of curiosity, I looked up the lux ratings and surprise surprise, Sony rates them the same at 4. I should also mention the FX7 has a lot of adjustability in the manual mode and their is a big picture difference between full auto and what can be done in manual.