I wouldnt say the potential for cheating is less with N/A cars than with forced induction.
If the manufacturer is supplying the press cars any number of things can be done to a N/A car that would shorten long term life span but add a significant boost in power. Most engines are detuned by quite a bit in order to preserve longevity and it would be very simple to add significant power if you dont care about the engine lasting 100k miles.
It might be easier with forced induction but I wouldnt say its any less likely with a N/A engine.
If that 458 had been riding on stock rubber and the time was the same then I'm sure there would be some really pissed off owners. But like I said.. I dont think the time would have been far off had it been completely stock.
The way ferrari handles the press indicates they have something to hide.
Nothing against their cars, they are fantastic. I just dont like the way Ferrari does things and never have. Their B.S goes back for decades... still cant get over what they did when Ford was going to win the championship so they got the rest of the season canceled.
I read a story about Enzo being such a prick to Ferruccio Lamborghini that it inspired him to make his own cars. All Ferruccio wanted to do was help Enzo with a clutch problem. The negative stories about the nasty things Ferrari has done over the decades cant all be false.