Bangkok seems to get everything 1-2 days earlier but in Pattaya here is my experience ordering stuff online:

 

China: Mostly takes 3 weeks, sometimes 4. 2 weeks is uncommon, 5-6 weeks is rare but happens

US: Once arrived after 2 weeks, usually 3

Europe: 3 weeks. I don't order much from here.

Australia: 5 days(!)

 

Nothing was special about that Australian order in times of priority shipping. Maybe Thailand just does a lot of business with them and has preferential routes?

 

Is this in line with what you guys have noticed?

No not at all.

 

China =  7 -10 days

US = 10-14 days (can be 7 at times)

Europe 7-14 days

Australia = 7 - 10 days

 

Central /North Thailand

^ pretty much what it takes for me, also depends on what "class" of postage used to send, signed for usually quicker.