A story so common they did not feel the need to share it? Even taking the least ludicrous numbers I'm going to say this is entirely made up.
- 3 C++ devs, 40 hours a week for 2 months (8wks) = 960 hours
- 1 Python dev, 40 hours a week for 6 weeks = 240 hours
4x difference in productivity is not a language difference, it's a programmer skill difference.
And just for the sake of seeing the numbers:
- 5 C++ devs, 40 hours a week for 6 months (24 wks) = 4800 hours
- 1 Python dev, 40 hours a week for 2 weeks = 80 hours
= 60x productivity
No.