Oracle developers switch to Solaris 10 as preferred development environment

So this news from SDN (Sun Developer Network) has come to my attention.
Oracle internal development switches to Solaris 10 (OpenSolaris is released in many milestones, two of them have already passed, but alot of work is also ahead).
I guess these guys really have no difference if to develop on Solaris, Windows, Fedora, SuSE, MacOS X4 tiger or Ubuntu as JDeveloper, Oracle Database and various other tools are readily available on those platforms. I find this kind of development intriguing as it probably is a political decision on behalf of Oracle.