Thats acctually somewhat wrong... Alonso's driving style at Renault seemed to have been a byproduct of the R26/27 chassis set up and rear biased balance. Also the way that Renault had set up their traction control system allowed Alonso to throw the car into corners with horrible understeer and get away with it. He adapted his driving style that best suited the car and reaped the rewards.
Now that he's at Mclaren he seems to have adopted a more traditional driving style, with more oversteer than anything now, which is quite an achievement since its such a dastic change from his previous (and successful) style. The guy really is mega by todays standards, he's smart, uncluttered and beaten the best. Like it or not he will be one of the greats