Terrain Response Question: Grass-Gravel-Snow Mode

I haven't got any experience with the Terrain Response system yet. If I am driving under heavy rain on a highway with an inch deep of running water on the surface, should I use the Grass-Gravel-Snow mode? The manual says "This program should be used where a firm surface is covered with loose or slippery material". Does running water on a highway consider slippery material?

Thanks!

no

+1, the DSC will handle everything necessary for aquaplaning

What, the DSC will even control that "sh!t your pants" moment when it all kicks off?

I believe you only get that with the Dynamic setting on the TR....................

Well - i've just come back from the Land Rover Experience Day where the instructor suggested that in heavy rain it was appropriate to select grass-gravel-snow - even up to 60 mph although do you really want to be doing that kind of speed in these conditions.

Last year I had a "moment" in my Freelander; I joined an autoroute in the half light early in the morning, as it wasn't raining or wet on the surface I set the cruise control to 125 kph and off we went - after a while I was suddenly aware of aquaplaning, but before I could do anything about it the DSC took over, it turned off the cruise control and gently slowed us down until the grip returned. I'm pretty sure that I had crossed a piece of road where the water was draining across it thus creating an aquaplaning situation, but by the time I realised it the car had dealt with it! These cars have quicker and cleverer reactions (never mind being braver off-road) than us.
My advice to Pugracer is dont worry, be careful as always, but have confidence that if you get it wrong occasionally the car will sort you out.

Thanks guys! Still in search of a piece of land in Hong Kong that I can use the TR system... LOL