Booked F was 0 or 1 at most. The day before my flight EK had flown an A380 to VIE for a launch event as they launched it a few weeks later on the route. The forward mini-cabin in J on my flight (a 777, the A380 wasn't on a scheduled service) had been booked out by Yamaha. They even replaced the headrests with Yamaha branding, so about 4 of us got upgraded to F.

PS: Fun fact. Chatting with the purser at one point she asked if I was EK staff because I appeared to know so much about EK and internal stuff FT Syndrome? I took it as a compliment