I've had my quattros for about 300-400 miles, and I think I'm having more trouble clipping in with them now than I did in the beginning. The last time I was in the shop, the guy moved my cleats back about half an inch, so maybe that's my problem. Anyway, I find that because the part I clip into rotates, the "hook" isn't always in the right place for an immediate engagement. Like you say, though, the platform is big enough that I can still usually get moving before the pedal is fully engaged, so I don't worry about it much. Also, I have much less trouble with my road setup (the smaller cleat built on the rubber platform, on Sidi Zetas) than with the standard eggbeater cleats on my recessed-cleat shoes...I think because the rubber platform is designed to fit on/around the pedal, which makes finding that "sweet spot" easier.

Even with the issues, I like my quattros soo much better than my old SPDs.