Why should one choose a 1 year PGDM program over 2 years?

MBA/ PGDM aspirants with  experience often feel  disconnect in  regular PGDM/MBA classroom where they feel  lack of intellectual stimulation. The course curriculum often seems easy and less motivating. In such cases, executive PGDMs come to rescue. However, the academia's latest debate is whether to spend 2 long years post working in the industry to do a MBA or is it wiser to go for a tailor-made, more customised, MBA of 1 year.

Share your opinion here on what sort of MBA makes more sense if you are looking for an accelerated career graph without wasting too much time.