Yes, with the current price of fuel we are using Flex takeoffs. Obviously, if anything seem out of place we go to TOGA. No questions asked.
It is not the first time I takeoff from short runways and a pool of water (aka LGA) and every time the software gives you performance numbers right on the edge for the most optimum Flex temperature. 2 weeks ago, I remember the accelerate stop distance remaining being 1 feet! You can imagine how our briefing went...