LTL
can be time critical, making it expedited. In fact, most expedited freight is less than a truckload - meaning it can be a small package or 3 or 4 skids, etc.. Is LTL expedited? Only if it's time critical and exclusive use.
Every load we did in our straight truck was LTL in the sense that it did not fill a semi trailer. With rare exceptions, every load we did was exclusive use in that the entire truck was dedicated to that load. Not every load we did was time-critical.
When we moved from FedEx Custom Critical to Landstar Express America, we learned that many of the loads we carried were not that urgent. The urgent, straight-through delivery times FCC imposed were imposed by FCC (automatically calculated by a computer), not by the shipper. While the freight was exclusive use, it was not time critical in the shipper's eyes. We continued to call ourselves expediters but much of the freight we hauled was not truly time-critical.
It mattered to all shippers that the small, exclusive-use load got on the truck, but once it was there, it did not matter to a good number of shippers if it was delivered the next day or the next week.