I attended the EETimes Netseminar on GHZ interconnects and see that the data set is now posted on this community site. In reviewing the NetSeminar data I sense there is not good correlation between the link speeds and widths. In other words, I suspect that many of the companies that said they will run at 10 Gbps will really do that with 4 parallel serial channels. How can I answer or prove that from the data? If you did not attend the seminar, see the data files on the non-forums part of the site in the Signal Integrity/Technical Resources section under Multi-GigaHertz. This file has some interesting trend information.
Rick Merrit from CMP Media, has supplied the following answer to this post: "About 45 percent of respondents to our survey said they were achieving 10Gbit rates today via parallel means. We did not ask them any more specifics, but we assume they may have meant 4x Xaui."
That's a good question. There is one pie chart in the presentation slides that can help. If you look at slide 11 you will see a pie chart showing that only 20% of the respondents were referring to single channels. It may have been more helpful if that chart had been on the slides that talk about link speeds. Rick Merritt may also have more insight on this, since he has access to the raw data."