Absolutely, it's important to blow off what the .NET salesmen say.
I've been shredded for not being pro-.NET enough by B2k and his fellow salesmen.
They claim it's ready for mission-critical work today!
I reviewed 3 mission-critical apps for Fortune 500 companies this week. Seems to be working far better than their J2EE apps. Took half the time to develop. Faster execution times. One of them has over a million transactions in an hour.