My Leon FR did approx 23,000 on the front bridgestones that came with the car from new, the rears lasted for aprox 28,000. I have now changed to Michellin Primacy as i do alot of motorway driving and these are supposed to last 30,000+ as they are a harder compound. Mine does get abused on corners but i always have TC turned on so that helps with the ware.
If you drive on particularly bad roads it might be worth checking your alignement on all 4 wheels, this saved the tyres on my old car after going through sets in less than 10,000 miles.