So, erm..... what exactly is the point of the article?
Seems to be no more than a diatribe about IAD.
Frankly, I don't think IAD is any better or worse than LHR and CDG as an airport. Can't vouch for comparisons against either CCU or NBO (although it would be wise of the author to note that CCU is not the gateway to the country capital - DEL is).
As for sitting outside the gate area at LHR..... not for me thanks - I'll be in the London Lounge - page me when the flight's boarding.