I just took over the profiler feature area that covers ETW events, and getting myself up to speed. If you're using the profiler to collect ETW event information, here's an unofficial reference chart on what is supported by OS version: 

OS

ETW Events

Correct ETW Event Times

IIS ETW Events

W2K

Not Supported

Not Supported

Not Supported

XP SP1

Yes

Not Supported

Not Supported

XP SP2

Yes

Yes

Not Supported

W2K3 SRV

Yes

Not Supported

Yes

W2K3 SRV SP1

Yes

Yes

Yes