Thought about your question yesterday, but did not know how I could best answer it. Duh, a lightbulb came on this morning.
Figured out how to get objective info, for insurance companies set theft loss rates to protect themselves. If Corvettes had a high theft rate, then insurance company theft loss rates would correspondingly be high to cover their losses, for obviously insurance companies are not into the business of losing money. Just had a long talk with my friend, who is a State Farm Master Agent (our insurance agent), has owned Corvettes for decades, has four now, one of which she personally and successfully completed an NCRS restoration on her own, a 1959 beauty.
She said that C6 Corvettes theft rates are low compared to industry norms and, this shocked me, that if I were to sell my 2006 Z06 (say worth about $35K), replace it today with a brand new StingRay, my rates would go down $13.45 per month, that the new Corvette qualifies for State Farm's maximum safety discount rating of 8% (above other discounts) due to its high safety rating. That State Farm is very happy with the StingRay's safety/security/integrity/theft-loss ratings, makes me happy.