We use a variety of methods to detect virtual machine (currently over 2 dozen methods).
Is there anything else that TurboFloat ensures for proper detection, and is the detection100% accurate?
No, it's not 100% accurate. We err on the side of false negatives (seeing virtual machines as "real computers"). And we don't have any active bug reports of false positives (seeing a real computer as a virtual machine).
The short answer: we're very very good at detecting virtual machines, and we get better with every version.