Delayed cord clamping

Has anyone experienced delayed cord clamping? I have been reading if you delay cutting the umbilical cord for 1-3 minutes or until the cord stops pulsating, it van increase the iron in baby's blood for a year, increase in social skills, and motor skills. I read it also helps pre mature babies tremendously. Just wondering if anyone has done this or is considering it. Also has anyone done this who is having a C-section?