I put this method to test on my B4.1 WC, I am running BB's with AE springs. Prior to the test I had settled on Grn/Grn springs, on the drop test the rear was so soft it slammed down. I ended up using the push and release method and found the front was way oversprung in balance. I dropped 2 springs to brwn/green and it was balanced. I had also been running fairly similar F/R pistons and oil, 1.6's and 32.5/30, I also changed the rear to 1.7/30 and on the bench damping front/rear felt very similar.
I only got one pack on the car and it worked well, I could tell that front and rear was indeed more balanced, either could be pushed too far, but if you didn't push it, it turned nicely. I am going to try the next spring up on both ends and see how that feels, I could use a little more "pop" over some jumps. We run on slicks on a nice clay mix, M4 seems to be the best combo, or JC blue/green.
After the springs I will play with camber links, I would like to be able to drive the car a little harder and have it keep its composure..