Is it possible to get case-sensitive filename handling in Cygwin 64-bit running on Windows 7 Professional 64-bit?

Is it possible to get case-sensitive filename handling in Cygwin 64-bit
running on Windows 7 Professional 64-bit?

I have been using Cygwin 32-bit on Windows 7 Professional 64-bit. I had
the HKLM\SYSTEM\CurrentControlSet\Control\Session
Manager\kernel\ObCaseInsensitive registry key set and all has been good: I
could get true case-sensitive filename handling, I could create FOO.txt
and foo.txt in the same directory.
Now that Cygwin 64-bit is released, I want to try it on Windows 7
Professional 64-bit. It turns out that the ObCaseInsensitive registry key
has no effect for Cygwin 64-bit because the key seems to be for the Win32
subsystem only. Subsystem for UNIX-based Applications (SUA) is also not
available in Windows 7 Professional 64-bit (Enterprise or Ultimate is
required). In fact, I don't even know if having SUA installed would help
at all.
Does anybody know if it is possible to get case-sensitive filename
handling with Cygwin 64-bit on Windows 7 Professional 64-bit?