Most of my smartphone forum experience is with Blackberry at an older community called PinStack. RIM (which is the old name for BB) was well aware of our forum and several others that had to do with BB and scanned the forums for feedback and ideas, and also contributed occasionally to answer tech questions. I'm pretty sure Apple keeps up with forums and community activity at its largest fan forums, especially in light of my next paragraph ↓↓↓↓↓.
Here's some trivia that most people don't know: At the time of Steve Job's untimely and tragic passing, the largest smartphone/tech "news source" on the net was Gizmodo. Link to it
here. At the time I was writing articles for Pinstack, and we (along with a number of other tech sites like
Phone Arena) were constantly scanning each other for news. When Steve Jobs passed, Apple released the news exclusively to Gizmodo several minutes before the news was released to the general press. Smartphone sites all over the net gleaned the news from Giz and and smartphone/forums were reporting the sad news for 10 to 15 minutes before it was reported by the "legitimate" press. The admin at Pinstack learned that this was done by Apple as a courtesy to the smartphone community. So, yes, Apple is well aware of the Apple and general tech communities like iMore.