I really like to let green stuff dry "some" before working it up, this gives best possible solution for my clients. Drying is exponential operation, "free" water comes out first and fast - then "held" water in cells migrates to the newly dry channels. We let timbers sit sticker in the wind under cover, ideally until lots of little checks just start to show - this is perfect. Depending upon species and climate, 6-12 months is great. You'll also see how wood starts to misbehave. This much drying does NOT drastically change the size of the piece, but helps make joints tighter in finished frame for long term.
One argument used to be hardness of wood. Irrelevant with the tools and techniques we use. Getting rid of this free water significantely changes weight of pieces and this helps if you work solo.
End sealer is good and bad for this. I usually leave end sealer off until after this free water release. Then apply it to slow the held water up and force it to migrate sideways. Ends won't blow apart. Good topic.
