100 Gig: Is market expectation in need of a reality check?

Recent market research suggests that the 100 Gigabit-per-second (Gbps) era is fast-approaching and that 100Gbps promises to leave the 40Gbps market opportunity in its wake.
“It could easily be ten to 15 years before we see 100Gbps in a big way on the public network side”
Mark Lutkowitz, Telecom Pragmatics