I am pretty sure many of the folks thinking about R2I have this question on mind - how successful other R2Is have been. Want to jot few lines on my exposure on this area, which might be of help.
I have seen many cases where people who did R2I have settled down, kids have grown up and have returned to US for education, even parents have moved back. Also, there are cases where only kids have gone outside and parents are content in India, where they got a chance to spend good amount of time with their families and parents.
Here are few of the cases where R2I folks did R2A (or R2 any other country) in a shorter amount of time...
Case #1: Funds for kids education in US: As you might be already aware, kids primary education in cities like Bangalore is expensive (anywhere from 1.5 - 4 lakhs/year). Once they are out of 10+2, there is a lots of competition for undergraduate courses (like Engg/Medicine - however, there are lots of options as well). Getting to IIT is out of reach for many kids due to severe level of competition (and reservation seats). If you are thinking of undergraduate studies for kids in US(or other countries), it can be quite expensive- think of 30-40K $/year in USCs. Hence, you may need $$$ earnings (or enough $$$ savings) instead of rupee earnings!. This was the reason one of the families went back after few years so that they have enough funds for kids undergraduate education.
Case #2: Work atmosphere: In a second case, a family did R2A due to uncomfortable work situation. As you might guess, the work environment is not as professional as in western countries here in India. So, if you are getting to a new job, you may have to deal with work dynamics (and lots of political environment, which offsets many people). In this case, family decided to go back rather than fight with the environment in a new company.
Case #3: Kid went for undergraduate studies: Kid got into a very good school in US and parents followed him, kid being the only one.
Case #4: Kid started in 9th grade and only one spouse moved to India: In this case, the kid was pretty grown up. Dad had to stay back due to work opportunities. They had a home back in US. I am sure kid missed the US friends and atmosphere, having been grown up there. And, it was easy to move back - R2I was more like a vacation!
I am sure once folks do R2A, they stop reading R2I blogs. However, if you one of the R2A cases and your 'heart is still here' (!), please add few lines as comment to reflect on why you did R2A. That will help other readers to make their choices.