I saw the announcement yesterday. The Kickstarter was at 5+ million in less than 2 hours. He's had at least one other monster Kickstarter campaign too. The leatherbound / signed edition of his first Stormlight Archive book raised over 6.5 million.
Looks like that gives him the top 2 spots in KS publishing:
https://www.kickstarter.com/discover...rt=most_funded