I saw that thread in the mic forum, and participated in it. I don't think anyone said the c1000s was bad, just that you can do better. If budget is a consideration, and even if it isn't, you can't go wrong with the MXL603 as overheads.
I've used both the 603 and the C1000s. While the c1000s is OK, I can't imagine why anyone would chose one over a 603 for a general purpose overhead mic, especially when they cost so much more.