It didn't take me much effort to see the grid on the Acer. Very easy to see.
I'm looking at one right now... can't see it at all. If I hold it under a bright light with the screen off when viewed from the side, I see something, but nothing dramatic, and certainly not something I would consider even mentioning. It would be like complaining that my TV gets lousy reception when turned off. :-)
This Acer is going back to the store when I get the transformer or maybe even the ipad2 (I am less convinced that Honeycomb is ready for prime time). I would never consider returning it for the reason you describe.