I may not be able to talk about ride queues but I can however talk about these ones
This shows everything thats different between Thorpe and Chessington, at Chessington F&B it's all about the customer service because units such as FCC and Pizza Pasta get so so busy compared to the like of Burger King, so what if they're over polite.. its just GOOD customer service, at a Merlin unit they'll say to 'enjoy the rest of your day', whereas at places like Burger King at Thorpe (and CWOA) the not very good English speaker of Asian origin will shout NEXT PLEASE before he's even handed over your fries.