VIA is denying this – or, at least, not offering any information, saying they've not heard of these plans. It wouldn't be a surprise, but it would be very bad news for the company who is already facing much tougher competition from larger chip manufacturers. I'd hate to see them crumble – though a small company, relatively, they have produced a lot of very cool stuff over the years, such as the infamous EPIA series boards which have spawned cults of dedicated followers.
The reasons cited by Digitimes for Lin's potential departure were increased pressure from companies like Intel and AMD, along with an “uncertain” future from VIA. I'd like to hear more from the company besides “We've not heard of anything”, so hopefully they will open up soon.