From everything I've read on this forum, I think an April delivery is very very unlikely.
My understanding is that Tesla are obsessed with selling all units in the same quarter that they are manufactured, For this reason, they manufacture for 'foreign' markets in the early part of the quarter so they can get them on ships and delivered within the same quater. The latter part of each quarter is dedicated to 'local' markets where they can get them delivered more quickly after manufacture.
If this is true, our Performance models will likely still be a bunch of parts at the moment waiting to get assembled in early April.
Its worth noting that to hit the mid/late May timeframe that Tesla have provided to some on here, the ship would need to leave Shanghai with our vehicles on board in mid/late April which would also fit with what I've said above.