Unfortunately as it seems, the implementation of Virtual WiFi in Windows 7 is not as liberal as the research prototype. In Windows 7, you are limited to exactly one virtual adapter. However by looking at the impact of multiple virtual adapters on latency and performance from their original research report, this is probably for good reasons.
I'm confused about this. About 70% of the article was based around multiple adapters, but then they say Windows 7 only allows 1 because of lag and performance issues.