New York Times: Tax credits, rebate checks, personalized home visits, government giveaways – even customer service calls from top corporate executives. The first all-electric car from a major auto company, the Nissan Leaf, arrives at dealerships in December, but thousands of Americans are already learning that going electric can come with perks like no other car purchase. "It just keeps getting better and better," said Justin McNaughton, among the 20,000 people who have reserved a Leaf. "My …