Traditional track geometry usually means angles approaching 75 degrees, but it's more complicated than just steep angles - for more information, read Don Walker's "The Truth About Track Geometry" here:

http://www.urbanvelo.org/issue3/urbanvelo3_p44-45.html

Unlike what a lot of people parrot on the internet, track geometry doesn't necessarily entail twitchy. Many track bikes have fast steering due to steep head tube angles, but a corresponding decent amount of trail to reduce twitchiness.