It's always interesting to see the differences in peoples preferences, even when using very similar set ups. Stiff is not necessarily fast; but it can often give that impression.
I'm running 3 clicks in from full soft on the rear, and fully soft on the front. Before fitting my Sway Bars, I was running 3 clicks in from full soft on the front to get some bite on turn in, but once I had the bars on, I found the front wanted to follow every groove and was just too "darty" on turn in and had to soften it. I'm not running any Preload on my front springs as I feel it only adds to the bouncy feel (springs pushing back too hard on rebound) some people find with coilovers.
I still have stacks of bite on turn in, but the front end is much more compliant over choppy stuff and I believe it has more "feel" and is quicker in corners now. I think if you set up too stiff, you don't allow the weight transfer that is needed to get good mid corner grip and feedback. You just end up with a really sudden transition to understeer/oversteer; especially in wet conditions.
Like I said, not saying anyone is right or wrong; but I'm interested in others opinions in this regard.
Cheers, Dale.