Protect your wall tiles with cardboard and take a hammer to the row of counter top tiles that are against the wall. Break them up good. Wearing gloves and using putty knives and screwdrives pull out all the little pieces of tile from that row closest to the wall. Wiggle them out from under the backsplash tile, they should come out fairly easily. This clears a distance the thickness of the tile for the counter to pivot up upon removal before it contacts and loads your backsplash tiles. If that proves to not be enough set the depth right on a circular saw or rotozip and zip through the cement board and pry that off too. It will take more finesse then normally is used when demoing kitchens but with a little caution, it should be very doable.

I'm not seeing a current picture witht he sink -- just the one with the paper down on the wood which I understand to be before use. That wall looks like it has a raw end of drywall, not a side that is finished (paper or whatever) or maybe even no drywall. It looks like they tried to smooth joint compound in there, either by itself over your studs and built up or over something less than a full side of finished drywall. Joint compound will turn to mud (that's what they call it when it's wet -- hence the verb to "mud" the walls) and dissolve away if it gets wet. Paint will only seal the surface, and if water gets behind it -- well, I dare say it is probably worse than damp sheetrock, which is worse than damp green board. You say they had to sheer away your window sill. Did that sill come below the window too? I don't think you've got clean drywall there. I think you've got a really poor job of mudding and an even worse job of sealing the joint. That's my guess.

I can see why it might be advisable to remove the left/rt portions of tile, but I would be inclined to wait until ithe kitchen is completed before deciding. If, as your gut tells you, it "needs" to come down, nothing is really lost except a little more time with it up. Perhaps knowing you are not "locked-in" or committed to it, will help give the perspective to view it more objectively while deciding for sure. This way you will not only have the chance to see it with everything else in place, but you will also have the opportunity to get used to it, before deciding if you truly dislike it, or just haven't gotten used to it being there. As subtle (in color) as our tile is, after months of looking at white painted Sheetrock, it still looked "different" and stood out when we looked at our kitchen. Once we became accustomed to it, we couldn't imagine our walls without it. That's how I am with many things--after living with a blank wall or empty space for any period of time, even a long awaited piece of furniture or decor item jumps out at me, and almost seems like too much, until I get used to the vacant space being filled. Thanks for the compliments on our backsplash Laura and andreak100! It's the Opera Glass tile from Artistic Tile (Stilatto pattern) in Wolfgang White. It does read greenish-blue(-grey) in certain lights or times of day. We had to think about that one while deciding if we wanted to use it, and obviously decided to go for it! Good luck Laura! Honestly, whatever you decide will look terrific!

You can remove it. You might just have to do some patching. We just removed all of the tiles on our fireplace and it took a great deal of the drywall with it. We just cut out some drywall and placed in the spots that needed it and then bought those patches they sell at Home Depot or Lowes. You can just throw those up and then put a spackle type product on top and then you can add the backsplash. My boyfriend and I did it all in a matter of hours. Not too terrible.