It doesn't mean too much but:
The first 161 was 6th and this is the guy that has been winning the series for the past 3-4 years... go figure form that!!!
It might just mean that he hasn't had time to get the board dialled/trimmed/finned properly yet though. Hard to say, most people I think would aggree that the 160 is better than the 159, but you still se good racers on the 159 finishing very well - probably one reason for this is that they know the board very very well by now. It could also mean that the 161 is a cockup like the TT05, which also tested really well before production, though I don't think so. I'd kinda like to what happens once the best sailers get a few months on the board and gets fin quivers and trim dialled.