He's sort of right.
Windows doesn't always display the available sample rates correctly... it depends on the driver and Windows.
The AP will cheerfully do 88 or 176 in WASAPI, or in Windows XP, so it can certainly do them.
Presumably, however, Windows 7 doesn't correctly interact with the AP driver.
The bigger issue is that whatever rate you have set in that "shared" dialog actually serves as a default,
and Windows 7 will usually re-sample anything you play to that sample rate (anything you play in DS mode),
which you would probably prefer it didn't do.
You play something in Foobar, in DS mode, with nothing else playing, and the "allow apps to have exclusive control" box checked,
and you will find that, while Foobar displays the correct rate, what's actually coming out is being re-sampled to
the rate you have chosen in that dialog box.
It won't do that in WASAPI (which works as it should).
Windows XP doesn't do any of that odd stuff.....