We are a fair bunch on WebmasterWorld.
What we don't like are companies releasing bad applications, and then not solving the issues we raise.
I spend a lot of money on PPC, I use adwords, overture and adcenter.
I change my budgets for the providers depending on how their applications work and the traffic they send.
I do not consider myself a "pioneer". All these companies charge me the full rate for each click so being nice while they fix their problems is something I'm not interesred in.
I have kept my adwords expenditure about the same over the last 3 years, I have slashed my Overture budget to 10% of its orignal spend, for me the jury is still out on adcenter.
The slating of adcenter will stop when they get their system to work to justify our bills.