With such an open and vocal group of commenters right here on the forum, one might think that Cakewalk would have no need for formal user surveys. Since groups like this represent only a tiny fraction of a program's users, though, CW is smart to seek input directly from their database.
The information gained from their survey is more reliable than comments from the forum, because the forum can be tainted by those who don't use or haven't purchased Sonar X2, while Cakewalk's survey seeks feedback from only registered users. Most forum regulars have seen people come on here and criticize Sonar, when they had never even tried the demo! By surveying registered users, Cakewalk is assured of gaining input from a dedicated group of people who only want to see our DAW of choice get better and better.
In my memory, Cakewalk conducts a mass survey at least once a year. In March of 2012, they did one that was focused on the ProChannel.