Just speaking from my experience at OASC.
They had a chart on the wall with all the treadmill times that would achieve you an amber pass, but not green. One of my group even asked and they just said that those were the amber guide speeds and that was a pass.
And not_so_sis, the times can vary greatly. Some people have to wait 2-3 months, some only a few weeks. Personally I had to wait around 3 weeks.