After some deep intial scepticism I think they'll be OK. It's difficult to know what everyone is doing, as we have variables in fuel, McLaren doing......whatever it is that they're doing and others like Red Bull simply getting the car prepped and set up but they've been fast enough right from the off.
They've certainly produced a neat and tidy car Ferrari, and it seems to be packaged pretty well unlike some other cars on the grid. Despite the talk about new aerodynamics and huge diffusers I think that's going to be critical with up to 70 kilos of fuel trying to move around under several Gs of force.
However, if the Ferrari is as thirsty as some people say and the fuel tank has to be large enough to handle it then we won't see the effect of that until the races really.