I also used glass tile, and that would be unacceptable. It's maddening how a tile guy could let that go. He's working within inches of the tiles and didn't notice the chips? Give me a break.
Were the tiles installed individually or were they on a mesh or taped mat?
If the tiles were on something like a 1' square mat, I would insist the entire mat be replaced. If several in a mat were damaged, then the entire mat might be of lesser quality tile. Also, when tile is installed using a mesh mat, then the bonding is important between the tile, mesh, and thinset. I'm not an expert, but it seems to me that if individual tiles are pulled off and replaced, then those tiles may be more likely to pop off later since they were not already adhered to the mesh from the beginning. Some of their strength relies on the mesh which had to be disturbed to pull them off, so the new tiles don't have the same strength. I hope some expert will set me straight if this is something that doesn't really matter. The other point being that when the damaged tiles are removed, the entire 1 sq ft mesh group might be compromised. But I wouldn't ask the PB or tile guys these questions, because they will tell you it's all fine. Try to research online to see if my thinking is possible. Time to cure before water is added would be another concern. I would want at least a week cure time and longer I think would be better. But..... my PB insisted one day was plenty. The makers of my tile insisted on a 3 week cure time. Most of my tile had that time, but my step tiles and trim tiles had about 2 days cure time. Time will tell for me.....
If the tiles were installed individually, then I would think it would be ok to pull off individual tiles and replace. My only concern about whether they would pop off later would be regarding how long they have to cure before water is added.
One more thing..... When they replace any of the tiles, watch the tile guys carefully and make sure they match the grout. That seems obvious, but trust me, you can't assume anything. It really is shocking how careless some workers are.
Like I said, I'm not a tile expert, but maybe this will give you some things to consider.
Your tile is beautiful!!! I love the different sizes and all the lovely blues! You are going to love them when you add water and sunlight together!
Let me know if you have any more questions. Take care!
Suz.