[ChristianK]

It's hard to tell, but likely. It is unclear, however, in which way these markings had been allocated to the different schools.

Most often, TS+MB is allocated to Fliegertechnische Schule 3 in München (because a lot of TS+MB-marked planes were captured there).

These Fw 190s marked TS+MA are said to have been captured at Bayreuth-Bindlach. But there was no Fliegertechnische Schule stationed in Bayreuth. Also, at least one of the Fw 190s in the photos up there is clearly not marked TS+MA, but rather also TS+MB (or +MR, +MD, +MP?).

To complicate matters even further, photos from Fassberg at the war's end show at least one of the planes from Fliegertechnische Schule 2 marked "FTS", which stands for Fliegertechnische Schule I guess - and does not fit in with the TS+Mx markings practice. So yes, TS+Mx indicates some school, but there are many uncertainties about further details..