It is not just one anecdotal story. I used to work for IBM, then have them as a client, then was a business partner, and have worked on their software for over 20 years.
Based on all my experience, they are slow and expensive, and over-build their teams. They do deliver the final product and it will work, which is why people hire them, but they do not do it efficiently.
Based on all my experience, they are slow and expensive, and over-build their teams. They do deliver the final product and it will work, which is why people hire them, but they do not do it efficiently.