update
Perhaps CX could read my mind? I was actually on the internet pricing out an SQ ticket and the waitlist came through.
End of story my J class waitlist got cleared without incident, or even a follow-up phone call. Thanks.
And btw...holy COW you can find cheap Scott "business" (in reality, more like premium economy) tickets, for like 300-400 SGD each way?!?! I was looking on Google Flights and this came up as the hands down cheapest biz fare. Of course, at closer examination this doesn't appear to really be business class but still, even for premium economy it's about 1/2 the price of CX and SQ. The timing wasn't going to happen (6am departure, no thanks), but I was pretty shocked to see that price.