Mono Version as of v3.1.0f4

What version of mono is included with Unity v3.1.0f4? The only thing I could find was a note that said "Upgrade Mono and C# compiler to Mono 2.6.3." in the 3.0 beta release notes. Is this still true for the current release?

I tried running the following, but it did not provide much info about the version.

C:\Program Files\Unity\Editor\Data\Mono\bin>mono --version

Mono JIT compiler version 2.0 (Visual Studio built mono) Copyright (C) 2002-2010 Novell, Inc and Contributors. www.mono-project.com TLS: normal GC: Included Boehm (with typed GC) SIGSEGV: normal Notification: Thread + polling Architecture: x86 Disabled: none