Excerpt from the article:

The path to merger success isn’t a steady, consistent, incremental process where each effort you make toward integration is matched by parallel gains. In the early stages of consolidation, you put forth a lot of effort but seem to get little accomplished. Then you hit the yield point, and that last little bit of effort gives great rewards. 

The yield point is like the sound barrier—it’s turbulent just before you reach it, but smooth as silk once it’s broken.