Hi all,
Apparently at least for UK, Mouser similar to DK ships orders from USA. Probably to save from shipping, if you have multiple items on backorder, they'd wait for all of them to become available, before shipping to you. On last occasion, I had to wait few months after one of my parts became available, before having it shipped as the other one was delayed a dozen times, yet they would wait, unlike most other suppliers that would ship as soon as part becomes in stock.
Way around this: if your order amount allows, split your order in separate orders and have the backordered parts in different orders - that way they'd ship as soon as all backordered parts in a single order are available. In my case I had over £100 order which if I knew that, could have split in three and still get free shipping, saving months delay on few needed bits and pieces!
Just thought this may be helpful to some of you.
Merry Christmas to you all!