Ye, the QB64 performance seems mostly unchanged, perhaps a hair slower than it was with Win10. I'm not positive about that yet.
I use Steve's graphics speed test, and my own number crunching speed test program. Both give more or less the same results as before. In my test, which creates three groups of five results, I get one or two slightly higher numbers in each group, than previously. But, still beta testing days for Win11, and that sort of stuff gets improved over time.
So, good deal there. In Steve's graphics test, the high number was increased when I enabled virtualization based security (VBS). Even using Windows 10. The low number was unchanged by VBS. And my number crunching performance numbers also unchanged, by VBS.