I have also generally made a habit of resizing large images. More so with vB than now, because now it scales the image display to fit the window. On OS X, it's easy to do with Preview. Just open up, then Tools, Adjust Size, lock the aspect and go for your preferred width.
To me, the main benefit of resizing is limiting bandwidth required for TMC as well as the user. Pages load faster, etc.. which is also one benefit of the thumbnail approach.
To me, the main benefit of resizing is limiting bandwidth required for TMC as well as the user. Pages load faster, etc.. which is also one benefit of the thumbnail approach.