I have a long response I'd love to write on this sometime, but right now based on my interactions with a large broker out of MN, all I can say is that if brokers spent as much time managing customs clearances as they did on tracing, the entire supply chain would be more efficient and there would be a significant improvement in the broker carrier relationship. The complete lack of concern that most 3pls have with border clearances while they are yelling for location updates is a symptom of the misunderstanding of where the real challenges lie.
This is so absolutely TRUE!!!
All after-hours calls here anymore revolve around getting loads cleared!