D.I.
I agree with the other responders. I potty trained my son at 22 months and it took 3 days. He was still having accidents, but he got the concept in 3 days. I also had a new baby on the way, and when the baby was born, my oldest regressed in every way EXCEPT for PT! Also, I did not use underware (just put his pants on) until he became a potty pro. I found that it added an extra step and those precious few seconds were often the difference between a successful potty use and an accident. Tip - don't leave the house for a few months without 2 changes of clothes and a roll of papertowels!
Give it a shot, and if it does not seem to be working abandon it for a few weeks. I have heard that if you wait past 2.5 it is much harder.