I have an 6'2" Spitfire RF and a 6'0" Spitfire FST. I have also owned a 6"1" RF Activator. I didn't like the feel of my Activator and broke my Spitfire RF in half in Southern Delaware. See Delaware is h e a v y thread (comical on a side note). The RF seems a bit soft - despite eps/epoxy combo. My FST has held up but I have mostly been surfing OCMD the most.
LB, I agree man - vague statements on flex makes me wonder if this is a band aid for high failure rates?
None the less. My 6'0" Spitfire is a good board. I liked my old 6"2" Sam Egan Resin8 better but that board is also in 2 pieces.