tire squeal

[JSILVER135I]

this might be a stupid question but ive noticed that when i do an aggresive start from a stop and my tires spin i dont get that high pitch squeal that is typical of spinning tires! to be honest i dont really hear anything?? all i really feel is the arse end of the car going sideways a bit!! i was just wondering why? does it have anything to do with the compound of the rubber on the runflats? or the fact that our cars weight is so well balanced from front to back? lol i wanna hear that squeal!!