For people with one backordered at B&H I ordered mine on the evening of November 2nd (date it was announced I believe) and received mine on Friday (April 5th), if that helps anyone. Only had time to get out for a handful of shots but pretty impressed...
I ordered from B&H on November 2nd, which I believe was the day the lens was announced. Still on backorder for me, with diddly squat information on when I might actually get it. Based on my experience with my R5 order I'm guessing I might get the len...