So, what the article says is "Salesmen inflate the ability of their devices so as to make them look better than the competition"...
Or as Murphy's law and other reasons why things go wrong says:
"Multiply all sales flyer's claims by 50%, and all salesmen's claims by another 50%"
I have measured 4,000,000 BYTES plus on a 5Ghz router.. That's the figure I trust. Since I measured it.
Of course this has nothing to do with range.. Range is function of signal strength (Inverse square law applies) and ambient noise, either natural or man made (IE a router on an adjecent channel) And "obstructions" between router and client.
5Ghz does not penetrate walls as well as 2.4 (or so I'm told) and yes, you can get 'high power" routers and clients, however there are federal limits (part 15 applies) On ONE channel (Channel 1 on the 2.4 side) I am licensed for higher power (but have nothing that can do it) so experimenters doing that have scored connections miles apart. But for the rest of us you are unlikely to do that.
You can improve your range however by modifying the antenna.. Two mods I have seen work well, or 3
One is a parabolic reflector that simpley Slips over the antenna on a Client (or router) with a "Sticks up like a finger" antenna... You print the design out on card stock, Cut it out (3 pieces) cover one of the cards with Aluminum foil and that's all folks . This will easily double your range.. google Open Roads Wi-Fi booster and I think you will find it (I stopped using one many years back)
The next one is found at amateurlogic.tv Download Episode 3
You need a can of Welch's Grape Juice or .. Similur can (I used coffee)
I did NOT re-cut the antenna as George did.
The 3rd method is a much more recent (last year sometime I think) episode of Amateur Logic.. On this one he took his original "Can-tenna' (Ep-3) and mounted it on a Sattelite TV dish... Full instructions are in the video and related blog.
This method gives serious signal improvement and range improvement.
But then.. I've known for a long time your best investiment if you want more range is a better antenna.
Using Google Maps find Francisco road, Union City, MI
Now find 9 Mile and Southfield roads in Southfield MI
Now find the distance between them
My parents lived on Francisco
Channel 2, Detroit.. Southfield and 9 mile (Studio and transmitter)
We watched Channel 2