I use a newer Airport Express (A/B/G & N) as my router. Over the last few months, I have replaced some older Wireless G hardware. My family now has two newer MacBook Pros, which both have Wireless N. I want to maximize my wireless connectivity. Does the Airport Express always run "N" until a device that is "G" or lower joins the network? For example, I'm on my MBP and nothing else is on the network. Am I getting "N" speeds? Now say, a family member fires up their first-gen iPod Touch (Wireless G). It is my understanding that, at this point, the Airport Express will switch over to "G". Is this how it works?