There will be people who applied in 2007 who will be getting green cards now but they won’t be F4’s from India, Mexico or the Philippines. I suspect you’re hearing about people from other countries, who are current.
It seems you are in India? So your PD is NOT current, you need to read the VB correctly. My guess is you’ve got another 5-8 years to go.
The VB isn’t useless or a vague guideline as to timings, it’s the legal basis for visa availability. Not current on there = no visa available to you by law.