That is likely luck: if your order makes a nice round truck full, and that truck full makes a nice round container full at the next stage, and the container is one of the last loaded onto a ship that is due to leave soon, you'll get the best delivery time. The next order will get the worst or close to.
As some of the recent supply chain issues are easing off things will be feeling better when they are in fact moving back in the direction of what was normal.
It depends on location and how often people in your area order from China. I used to get ePacket orders from Shenzhen to San Jose within 10 days every time. Now that ePacket is dead, AliExpress standard shipping takes 14 days.
I placed an order June 30, it arrived July 17.