Not saying there are no roles like this--just saying this probably several standard deviations from the mean, and not useful as a "back of the envelope estimation of big company tech salaries in general"
I've been promoted faster than most, but my numbers stretched over a 5 year timespan still work out.
MPG1 is the entry level grade BTW
Negotiated a 40%(!) raise after 1.5 years because I was kicking ass and had +40% offers in hand(!) from other BigCo's that I interviewed at.
Since then I've been getting 2-3% cost-of-living raises annually. I would say my performance is above average, but that's my opinion.
Definitely not seeing 10% or $30k annual raises and my total pay is significantly below $250k still. Maybe I need to do another round of external interviewing again.
That being said, I like my work and have good benefits and really good compensation compared to non-tech work.
Orthogonal to the point of the article, but the only time you can really get a salary bump is before you start, so make sure to negotiate like hell before you get in. Once you're in, you're going to be grinding to get a 3% raise (contrary to what the OP states).