At our store, we had 2 and 2 PS3's, with 8 spots for rainchecks. From what the people in line were saying (including one who had his laptop with him in the store and had waited 30+ hours in line and had his unit sold for $2,000+ before he actually purchased it), only one of the 12 people were actually there to get themselves a PS3.
And yet, with 20 people in line (more actually, but we only had 20 Wii), I don't think anyone there (espically the cute Russian chick that was #2 and, we found out through the course of the evening that she's my wife's friend's sister in law and was really excited about Trauma Center) was planning to sell their system on eBay.
Also, I haven't looked at the numbers (because I'm off today) but the Tie-in ratio must have been better. You know, we didn't sell a single PS3 game... and there were tons of Wii games being purchase. Of course, I think everyone pretty much got Zelda, but even second party titles flew - one mother got about 5 titles for her kids while waiting in line (I'm proud of her, I talked her into getting her kids one about a month ago... she tried to preorder, but... well, missed out on that)
It was a fun night.