You're kidding me, right?
What in the earth are you thinking?
If you're going to use dev textures, try even use something else than some monitor or what ever texture you have there. Do you use nodraw at all?
Aside from the douchey-ness of the comment, and necessity of it (none), what you're insulting him on is quite derp on its own. It's about preference. I doubt he's going to release the map as is, or planned to, but rather to just use the textures while developing the map, like a lot of people do :/. It really doesn't even matter.
As for the actual map, I can't really tell what you're making here. Is that the interior of some building, a balcony, tower, bunker, etc?