it has been a few thousand kilometers this year, but nothing spectacular in numbers
and considering my alignment settings for the front of the car is at -1.5 camber and 0.5 toe-in; the wear was noticable, but not extensive and was fairly even on the sides of the tyre. I might even go a bit more agressive with settings this year.
His toe problems were present because of not having control arms and steering rods parallel. As they are similar length, they tend to 'draw the same arc' and when suspension compresses, these both move up in their own arc. This is actually the same problem as bump steer. - if not parallel, they change the position of the spindle in relation to direction of the car when cornering over a bump.