They could be reading this right now... lol.
Honestly though, I do think there's a good chance some of Apple's top people read through internet forums like this. If you think about it, you really couldn't get better feedback anywhere else. Atleast, when it comes to the tech-nerds.
It really doesn't take that much reading through one of the subforums here to get a grasp on what MOST techie people think about current and future products. You may not agree with this, but maybe if you think about it, you'll realize there really isn't much variety when it comes to our geek opinions.
They don't have to scurry around a billion websites to get the idea that most of us want feature X or Y. If it's at all important, it's most likely mentioned here. Or if it's a debatable topic, you could probably see all sides of the arguments here. Big screen or small screen on the iPhone 5? That's debated in basically every thread. Just an example.
Now you might say we're the minority, and we don't matter, but just take a moment and think about all the consumers out there that don't know anything. Think of completely dumb statements you've heard them say, or weird things they've heard about [tech product]. Where are they getting these crazy ideas from? Other techies of somesort. When a seemingly more knowledgable person tells a normal consumer something, it spreads like wildfire. Now my example showed the negative effect of this (fanboys of other products spreading craziness) but I think you still see what I'm saying, and if you were to tell someone valuable, unbiased information about a product, they'd believe that too. The example is just more relatable to you, because I'm absolutely sure you've had an experience like that and you remember it because of how profoundly mislead the person was.
If you're a father or mother of a household and your family has mostly iPhones, I'm guessing that's because of you. (I don't know your situation, but you might be able to relate to this) You just helped sell X amount of iPhones, simply because of how Apple convinced YOU it was the best product. Realize this happens everyday in millions of homes, groups of friends, ect., and I think you'll see you're more important than you think.
This is a long post and I realize I got off-topic to some extent, but what I'm really trying to say, is: You're more valuable to Apple than you know, and Apple can't study you enough. Online forums are insanely popular ways for us to communicate, and it's an open-window into our thoughts, needs, and wants
Peace to you