It's been around a very long time.
It's called a "Leading Axle Fork".
Very common on motocross bikes, especially.
The Bullet has always had a small amount of leading axle geometry, and it was apparently increased with the new UCE forks.
It usually has the effect of reducing trail, giving quicker response to turning.
The old Bullet has about 4.75" of trail.
You could measure the trail on your C5, and see what it is.