Strange that nowhere in the article does it mention that LHR only has two parallel runways. Compare to other hubs. E.g. Atlanta's ATL has five, and Dallas's DFW has seven.

As Wikipedia puts it [1]:

   With only two runways, operating at over 98%
   of their capacity, Heathrow has little room
   for more flights 

It's hard to be "the" hub airport until that problem is solved.

Edit: just looked up Amsterdam's AMS runway situation. They have six. It's hard for me to understand how someone writes an article like this without understanding such very very basic facts.

[1] http://en.wikipedia.org/wiki/Heathrow#Regulation