It's all about perspective. As a Southern-based, East Coast flier, I find the North Carolina-based agents to be much more friendly and knowledgeable.
I admit, I found the Plat agents in 2008 to be very challenging, and I often had to be transferred to someone in Tempe corporate to handle my reservation and voucher issues.
This year as Gold and as a travel manager for someone who is CP, I had great service from the Gold and CP lines. I hope the Plat line has improved this year.