I don't know how many were sent or how wide spread the survey is but I did get one sent to me and it took about 15 minutes to complete.
The views expressed were consistent with what I've said on this forum before about my experiences. APR and credit line is not competitive with Citi Chase or B of A. Website is really good. Customer service is good on routine matters but if an issue is handed off to the credit department its like going to a different planet.
Discover is back of wallet until it becomes competitive on fundamentals.
They have their ears on but we'll see what others have to say and if they are really listening.
Their words are not in line with their actions IMO at present, but company's can and do respond and change if they want to grow and if they really are customer focused.