This is an interesting observation, and I am wondering if it is related to power level. For me, I'm getting very little lateral movement out of the Servo, but I also don't have a big arm.
Took the Servo out for a full round today and used it off the tee for all 18, even on holes where I knew that wasn't the best idea. It is very, very straight, with just a minor fade at the end. Much more like a TL than the C-FD like I first thought. In fact, I threw this back to back with the C-FD a lot, and got way more turn out of the C-FD. The fade on the FD was also stronger.
As for distance potential, I will say the C-FD has a bit more glide, so it ended up going a little further. But for line holding, the Servo had it beat.
As a lefty, though, I often need to be able to make a disc hold an anny to the ground, especially on those righty-friendly, backwards C-shaped holes. I still tried the Servo on those today, and even with the harshest of annies it would still flex out after about 80% of the flight. They were always very tight, tidy s-curves that still didn't move much left to right, but I don't think this thing will be turning over at my power level any time soon.
But man, it is precise. I already feel very confident using the Servo to hit tight gaps, which opened up a couple different lines for me at my home course that I don't normally take. I was also more confident than usual on a couple double mando holes that I will usually have to either flex a stable driver with, or flip an understable disc to flat and hope I don't turn it over before the mando. With the Servo, I just ripped it flat and watched it cruise on that line, with less fade than I usually get out of something with this much high speed stability. Throw it straight, it ends straight.
Looking forward to seeing how this one breaks in and if it will develop more turn first, or lose the fade. If it loses the fade, man, it'll be pinpoint accuracy all day. If it develops more turn, it'll be a great line-shaper. Seems like a win-win.