yes. Thicken was added in 2011 I think. However, do not dispare if you do not have it as it only works about 10% of the time. Most of the time when I have tried to use it random verts will go shooting off into space. In the end I end up just moving everything along the normals (z-axis for extrude).

For extrude there has always been a offset and of course for added thickness extruding along the normal (which is the z-axis for some reason) has always been the way to add thickness in Maya. In 2011 or 2012 they added a gimpy version of thicken (I was very excited to see it added) but very quickly became disheartened as it very rarely works properly. I have put in at least half a dozen bug reports on thicken alone.