It is cut in half for every client on a given access point. Also remember that co-channel interference from adjacent channels have an affect also, meaning the bandwidth is shared on a channel. Your throughput is also affected by how many clients on a given AP since your AP will have a gigabit Ethernet connection. Never assume that the ipads will want to all connect on the 5ghz or that they are all new and support the 5ghz.
Thanks,
Scott
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-Scott
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