It's true, the upper and lowers arms are pratically parallel and this takes the instant center to infinity, but below the ground due to this unnusual inclination. The GRC ends up being pretty high in my opinion.
Here are some examples...
Do you know why the F1 cars in the last years have been using this different front suspension geometry?
The static roll center seems to be very high, and I can't figure out why.
I know that there is little roll, but won't the ouside wheel loose -ve camber in corners?