I think what can be derived from this thread and the one at Aerosoft, is that this plane has a different impact on different machines. That's what I've come to expect from any aircraft. However, on my machine, which is all I can comment on, it performs very well. Certainly well within acceptable limits for my use.
The following comparison on FPS was taken with the airplanes engines running, sat on the runway at Plum Island, all systems good to go. That means that all glass gauges were warmed up too. My settings were set as the images display below, these are my usual settings for regular GA flights. I tried a cross section of aircraft which I hope cover most bases.
I'd also like to point out that I don't hold much with the "FPS" argument as I also believe that it's about the fluidity of the sim. I seldom check the FPS counter, but do on this occasion simply to show how different PC's handle aircraft in different ways.
My PC:
Intel E8400 Duo 2 Core 3Ghz 1333 Mhz 6Mb CPU, MSI X38 Motherboard, Corsair 2Gb DDR3 1333 (Matched pair), Samsung/Seagate 500Gb 16Mb Cache HDD SATA, 20x DVD Re-Writer ( + & - ) (Lightscribe), Ge-Force 9800 GTX PCie 512Mb Graphics, Creative X-Fi Extreme Audio Card, Dual Gigabit Lan, Deluxe Midi Tower Case with Superior Tagan 900w PSU, USB 2.0 x 8 (2 on front), Windows Vista Home Premium
FPS Comparison:
Default Trike: 30
Default Baron 58 (steam): 30
Skysim BAE Hawk: 30
Default C172SP (steam): 30
A2A P-40: 30
Default C172SP (glass): 29
A2A B-17: 28
Default Baron 58 (glass): 25
Aerosoft Bush Hawk: 25
Eaglesoft SR22G3 Turbo (glass): 22
A2A Boeing 377 Strat: 19
CS Boeing 757: 18
As you can see from the results above, there is a definite reduction in FPS from the default aircraft with the exception of the glass driven default Baron 58. However I'm reaching far better frames with the Bush Hawk that I do with the A2A Boeing 377, which I'd expect, but other users are commenting that the 377 runs at a higher FPS.
So there you have it, you'll each make your own decision based on what you want from an aircraft and from others experiences. Personally I'm very happy, but I may be seen to be biased too, there's nothing I can do about that, sorry.