A couple of SWAGs (Scientific Wild-A** Guesses):
1) size: it's a double-yolker, which is very common with new layers
2) powdery texture: lots of tiny calcium deposits on it, which is also very common with new layers, as their system is still getting the kinks out of the shell-deposit process
And I guess? it's possible that the calcium deposits are covering whatever color the shell really is, making it seem a lot paler. Once you crack it, check out the color of the inside of the egg shell. If it's a pale blue, it's most likely from your EE. The outside of the eggs can be a different color, including green or pink, if any brown pigment is deposited at the end of the egg-laying pipeline. (This is often jokingly referred to as the "paint booth" around here, because unlike the blue which is present at the beginning, the brown gets "sprayed" on right before the egg is laid.)
My Buff Orpington started with lots of calcium deposits, too, which have pretty much calmed down now. But her eggs are never smooth, which gives them sort of a matte texture. It's a handy way of distinguishing her brown eggs from the Barred Rock's brown eggs.
