Change in spawn time from 4 hours to 2?

Could someone confirm if it's still four hours till the next spawn? Another player told me that it's actually two hours.

NTS: Trickster spawned at est. 9:14 PM PDT and was killed at 9:15 PDT, 10/29/2015 on Channel 2 Alexina. That would mean the next spawn will be around either 11:15 PM or 1:15 AM.

Time between spawns has consistently been about 2 hours on Tarlach. It was probably changed this year.