Not eggszactly.
The reshaping of the horizontal stab - as the elevator is deflected can cause a problem- flutter /reversal -
The one piece setup allows the entire surface to be put at the angle needed for CONTROL. The entire surface -at speed - is closer to the actual line of flight, than a bent surface. (stab + ele trim)
The flapping required for low speed control is not just "gravy". .
These fighter types require a huge range of tailplane angles -impossible with a hinged surface setup
On point tho-- for our models- no such issues exist
a real issue on these ,is that the stabilator requires precise control and slop and inaccuracies in aerodynamic balance and poor linkages can make the setup dicey.
That makes sense, when I was pulling the stabs off the Hornet I had to disconnect the hydraulic/electric actuator output shafts from the fork on the stabilators, as I remember the output shafts were huge with ball ends large enough for .750"-1.00" titanium pins that went through the drive forks and 0 slop anyplace in the system. I also noted that the stab rotation yokes were located aft of the leading edges around 35 to 40% of the entire stabilators, so there was more surface area behind the center of the pivoting point instead of in front of it allowing the trailing portion of the surfaces to possess the loaded advantage.
Bob