Its generally approximately a decade in my experience, and your advice is not applicable to Indian citizens (of which there are many, many waiting in the quota line). Your fast example is possible but not the norm outside of marriage.

His example is true for Singaporean nationals and some other countries as well, but big picture Indian+Chinese+Mexican+Filipino born (H1B bucket is based on place of birth not citizenship, so I've had Indian citizen friends born in Singapore who got green cards in 2 years after their F1) people are screwed.

The point I was responding to is "the earliest an H1B holder could likely become a voter" - which I agree, the average is probably 10 years, but the earliest is much shorter if you and your employer are motivated. And of course, the shortest time it takes definitely doesn't apply to Indians. Even during COVID and having two RFEs (and not being super diligent at a few points) the GC process took me 3 years. That puts me on the 8 year clock should I pursue citizenship.

Hence my use of the word "likely" - it was never stated as fact. Your own personal example is 80 percent of the way there!

And besides voting and being able to leave the country for more than six months, there are no advantages to citizenship. A lot of people just stop at their green cards, especially if their origin country doesn’t support dual citizenship.