The Leaf draws 1KW/hour while charging which works out to under $0.10 of electricity per hour
He's obviously talking about the charging rate and translating it to price of electricity per hour. He's not talking about the actual energy used.
The writer obviously meant to write 1 kW. However, even this figure is not accurate. Some googling brought me here, which states the Nissan LEAF charging rate to be 6.6 kW.