Steve, why on earth should I be upset.
I firmly believe that she has never had a punter pay the £600, there are some total pricks in this industry but no one would be that stupid.
I think you are upset because it's beyond your imagination that there are guys out there who are happy to pay what we wouldn't and don't realise or care what is available for £120 an hr or less
I'm sure she has had punters at that price. Not many possibly but there are quite a few out there who think £600/hr is quite acceptable
There are several agency sites in London quoting £1000+ /hr and I'm sure they will get some punters
Guys staying at the Savoy, Dorchester etc will just call the concierge to arrange and will happily pay it
£600/hr would be a bargain to them