It's very different between teams. My personal experience: everyone I've worked with is trying really hard to put me in a position where I can succeed. I've been put on very visible projects (from day one) and I'm getting constant help from my TL to keep me on a track to get promoted. Everyone I work with directly is amazing.
Google is a magical place but the standard deviation in experiences are large.
I've personally been very happy with my experience/team.