Just saw this thread and it makes me feel worried...
I ordered something on Sunday with 2-4 days shipping promised and today, on Tuesday, I get an email that they will contact me again when they have processed my order.
I feel a bit unpatient and worried already. I should stick to net-a-porter.com, they've always been soooo fast.
But farfetch definitely has some GREAT items. Let's hope all works out fine and I'll get my order till Thursday...