Cisco, much like Oracle, probably doesn't make that much money off of the average startup. It might behoove them to wisen up somewhat and start introducing some lighter-weight / lower-cost entries to the market.
That said, regarding the 20Mbit/s, never forget that Cisco sells networking equipment. Cisco's point (and it's not a hard sell) is that teleconferencing and network are so interrelated that you may as well buy it all from Cisco.
I will say that their 3-screen 1080p telepresence solution is fricking awesome though. Lifelike. BELIEVABLE. And for Fortune 500 companies that are weighing this sort of thing against the cost of flying three people from New York to Tokyo for a meeting, it's not a bad value prop.