I noticed this yesterday after i updated to 1.19a, i was doing a few quests running between towns on airships. Everytime i arrived at the airport either by the airship or elevator NPCs were taking over 30 seconds to load.

CPU: Intel Core i7-2600K Sandy Bridge 3.4GHz BX80623I72600K
SSD: OCZ Vertex 3 – MAX IOPS Edition VTX3MI-25SAT3-120G
GPU: EVGA 03G-P3-1596-AR GeForce GTX 590 Classified
Network: Time Warner Cable
Network speed test: 8.04 MB/s down, 2.46 MB/s up