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Always two camps on this arguement with strong beliefs from each.
There is little real evidence to support either side.
Race engines are very different and not a good comparison. They're built to much looser tolerances, generally have much lighter reciprocating gear, and are designed to run at higher revs for long periods. They also spend much less time idling, or stop&go, so oil pressures and flow is generally higher /hr. run. Coolant too. Maybe more importantly, they generally are in better tune, receive greater and more regular maintenance attention than the average street car engine.
It all pretty much boils down to what you believe and how you want to drive your car. They all pretty much break eventually no matter what.
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