So some thoughts following Thursday. Easily the best of the booths I saw in terms of queuing time. Folk were limited to 10 minute plays and the queue just kept moving. So kudos to Sega/Creative Assembly on that.
The very nature of Survivor mode is completely different to the main single player. The whole idea to be fast and not take your time. And given that speed based nature of the mode and the demo, there wasn't really time to fully explore and experience the map at hand.
That said, it was still an intense experience and time slowed down as that Alien slithered down from the vent to block me and slow my time down. I had to have 5 goes before I was able to complete the demo and each play through was completely different which I really liked. It was just a case of learning the map and out-doing the Alien.