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I should have asked what kind of connection do you have? Dish, cable, DSL

(edit1)
Looks like a Dish connection.

From the same place they offer an optimizer that might help.

SpeedGuide.net :: TCP Optimizer / Downloads

(edit1)
I see they have newer version than mine. Getting it.

That is slow upload.

What is your connection speed? Try Speedtest.
Speedtest.net by Ookla - The Global Broadband Speed Test

Here's mine
219225

Can you edit them down to 700 pixels wide or long? Forum's limit I believe. That will reduce size of uploaded image file and could speed things up.

Also I found if I delay to long in composing...