My brother flies as an F/O on the 757/767 for Delta in the States and current monthly take home pay after just 2 years is $7,500 USD per month pre-tax (don't know Pound Sterling translation). That's great for only being there two years - and that is before Delta's new contract is hammered out...
He expects $130/hr as a 767 domestic F/O flying 75 hours per month with the new contract. You're right, the US flyboys are paid a lot more than their Euro counterparts. You can thank United Airlines and their new pilot contract for that! What a great profession!
Happy Flying!