In contrast, Steve Jobs was known for randomly answering customer support calls to better understand the customer. http://www.cnn.com/2011/11/22/tech/innovation/jobs-excerpt-c...
A couple of months ago I sent an email about a bug in the iBooks iPhone App directly to Tim Cook. A couple of days later, an Apple PM responsible for the iBooks App sent me a mail telling me to describe the problem a bit more precise. I offered to take a video and sent it to him. It went back and forth a bit (but always the same person!) and in the next iOS patch the bug was fixed.