Yes we were all there for Xmas thru New Years for the last couple of years. 10 or so of us last year and more the year before. Jimmys is alright with the WSW but if it turns very South then the wind gets disrupted by the land mass(Nelson) and makes for all sorts of gusts.
Jimmys is best in a NE near the sandbar where it is shallow for maybe 200 meters when tide is low. Even though wind is straight offshore, the water is very flat and gives even begginers a place to kite where they can walk to re-launch. Just keep an eye out for the end of the sand bar as if you go past that and can not go upwind, you will end up on the other side of the bay. We had one guy do that last year and he luckily had emergency money in his harness and took the ferry back to Jimmys. On the ocean side, the best is a downwinder from Tea gardens to Hawksnest(NE wind). You can drive on the beach almost all the way from Tea gardens to Hawksnest so that your support crew(non kiting girlfriend or wife) can follow you along.
Cheers