Those incidents are really fabulous, often they are even more valuable than speaking to an engineer at WWDC. I had a very enjoyable experience with the very incident I sent in November 2010. At that time I wanted to know how to animate in a date picker over a table view to enter a date. Within a few days I had gotten an answer of sorts and the solution even ended up in the developer samples.
I have been an Apple Developer member for 14 years. That goes back to the days when a developer account cost $499 and $3500 per year! Do you know how many times I’ve used my support incidents? ZERO! I’m ashamed to say that, but it’s true. I will however use those incidents from now on. And I encourage you to do the same. Thanks Dr. Touch!