Not sure if this is the place to ask this, but I couldn't find a more appropriate StackExchange site. I heard that the quality of wireless connection follows the law of the lowest common denominator - meaning that if 10 users connect to an AP at 50Mbit and one at 5Mbit, everyone gets stuck with 5.

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Can anyone, with 100% accuracy, say whether this is true or not? I'm asking because we have 8-10 WRT54GLs on DD-WRT powering our company network, and wired speeds through those APs are up in the 50-90Mbit, while wireless can't seem to go above 9Mbit.