This is a zombie thread, but thought I'd add to it for someone who may use it. I just did almost this exact same thing as the OP.
8 gallons of 1.050, mashed 70 minutes at a range of 145-150, didn't stir good enough halfway through. Pitched a 2L starter (1.050) @73, that ramped up to 77f. Activity started hard within 2-3 hours and main ferment finished within 24-36 hours down to 1.010. I added 1.5 lbs of turbinado which finished out in 12 hours. At day three it measures 1.009. I'm hoping to get to 1.005 and have it at 80 and 90f (two fermenters of 4G each).
WLP565 is supposed to be the same as Wyeast 3724, Dupont strains. Just like the OP I was a little worried and read a lot about it, but it has acted more aggressive and faster than any other yeast I've ever used.