Whats the big hoo haa about it costing £14? I assume the £14 price that is being quoted is for a burger, drink and fries? If so I'm not sure why so many people are complaining, you'd be paying that much at most (if not all) 'trendy' burger joints up and down the country.
Almost Famous is about £7-£10 for a burger, add your fries for another £2-£4, then your drink for another £2-£4, Solita is more in some cases and you can pay upwards of £15 for your burger (inc chips though).
I'm fairly sure the same can be said of Byron, GBK, P&B etc.
It's the fact that it's considered cheap food in the USA plus in the UK it's not even table service. You're talking a few rungs up from BK at 2.5 times the price.