Really?
"On Bedford’s West Circuit the Focus RS was somewhat hampered by its weight – it was fast at the beginning of the lap but its times dropped off as the brakes and tyres struggled towards the end of each lap. At 1:26.9 It was faster than the SEAT (by 0.9sec) but 0.7sec slower than the tenacious Type-R.
The RS’s unruly nature saw it struggle in some of the faster corners such as Tower where the Civic could manage an 83mph maximum, nearly 10mph faster than the RS which was impeded by its tendency to oversteer. Ultimately the RS was fun, but not the quickest."
Ford marketing blub aside, it's not the most track focused of the hot hatches, and like almost every car designed for everyday road use, its compromised on the track. I've literally lost count of the number of road cars I've driven on-track and with very, very few exceptions (such as a Radical SR3) they are almost all limited by the requirements of being road legal and more importantly having to be driven day to day.
Even those such as the RS (or my own I30n) that have adaptive damper settings that are almost unusable on the road still fall into that category (and Hyundai even go so far as to warranty N cars for track use). Are they less compromised than your day to day commuter cars? Yes, but they are still principally designed for fast road use, and the higher terminal speeds and forces (in all directions) that a track throws at a car will expose just that.
This video is perhaps the most illustrative example of this, a BTCC car vs a McLaren P1 at Silverstone, same driver and the BTCC lap was with traffic during qualy. The P1 is nowhere near as settled and as controllable as the Touring Car, despite being perhaps one of the more extreme example of a road car "factory optimized for track usage".
The Focus RS impresses with strong performance and great handling
www.evo.co.uk