Multi-axle differential steering?

[wossname]

I just noticed that my newly constructed heavy rover vehicle has what appears to be realistic looking differential steering.  Am I imagining it or is KSP really doing that?  It's a bit tricky to measure the angles of steering on each wheel accurately.  It looks seriously awesome anyway, but the thing that really blew my mind was the fact that it does it on all of my steering axles!

 

It looks and behaves just like a real-world truck would...

KSP is now smart enough to do this be default!  I love this feature.  Is it new in 1.2.0 or have I just never noticed it and it's been there for ages?

Also, does anyone know if these new steering angles provide more efficient traction for KSP in-game wheels?

[Freshmeat]

I think it has been there a while.

[katateochi]

It has been like that, I think ever since they added stock wheels. 
but it's based on where the COM of the craft is, rather than where the center of the wheel base is.  So as the weight shifts the balance of steering on all the wheels shifts.  I totally get why they had  to make it like that, but it doesn't always produce the desired results.