I don't think so. It's multiple direct 10GE ports. Given the traffic volume the two networks exchange, there's no way it would be economical to move these bits over a public peering exchange (which Comcast doesn't participate in in the first place).
Even so, if it were in fact going via the IX, you'd see Netflix's IP from the exchange (206.223.116.133) as hop 8 in the traceroute.
Am I understanding this right? If I am an ISP, I can request a Netflix appliance and serve customer requests for netflix content from this appliance directly?
Even so, if it were in fact going via the IX, you'd see Netflix's IP from the exchange (206.223.116.133) as hop 8 in the traceroute.