I have yet to work in a shop that goes all M$ for anything but political or M$ marketing reasons. Anyway you slice it, it becomes religion, not logic.

I would try to find out why they are so stuck on M$. The battle you are really fighting probably has nothing to do with the obvious technical issues. It probably has a lot more to do with someone's nose up someone's dark side.

One contract I had, the programmers were so arrogant (and ignorant) that they simply dismissed any and all evidence counter to there position as uneducated rubbish. My mistake was to continue to pursue reason -run the tests see if the given conclusions from real world experiences pan out. All that did was make people upset. Though in the end, my program way outperformed expectations, and provided unbelievable upgradeability, I proved the wrong people wrong. I won my battle, lost my war.

The moral of my story is a paycheck is a paycheck, and a good reccomendation from an idiot is still a good recommendation. Tread lightly, do the project, add a skillset, and move on. Good luck.