I've heard of the 18 month rule, but it wasn't how it worked in my experience. My first project lasted 4 months and ended with a successful launch. My second lasted two months and ended when I was pulled off (actually, I volunteered) to work on a project more suited to my abilities.
YMMV. Google is a giant corp, I'm sure there are bad managers somewhere (and I've heard of Nooglers getting stuck on a bad project and then leaving for Facebook), but if you keep your eyes open for opportunities and work to build relationships with your new team, you can usually transfer regardless of what the rules say.
YMMV. Google is a giant corp, I'm sure there are bad managers somewhere (and I've heard of Nooglers getting stuck on a bad project and then leaving for Facebook), but if you keep your eyes open for opportunities and work to build relationships with your new team, you can usually transfer regardless of what the rules say.