I'd buy that logic if it produced low defect rates and high uptime, but it doesn't. When we used SilverPop earlier this year it was down about 5% of the time and wrong 5% of the time, and even the basic way the interfaces we had to integrate with worked was a mess.

I don't think their process is heavy because it's rigorous, I think it's heavy because it's a reflection of their corporate structure (which is large).