Don't know,too close up to judge the size. Can you back up and take a picture of the shower so we can see the scale? Thanks

I'm guessing you're referring to the vertical grout lines being a different width than the horizontal ones? From the pic above, no I don't think it would, but a picture from a little further away + a shot that includes more of the tile to give us a judge of the scale would be very helpful. As such, I will refrain from giving my final answer until then.

Are the tiles beveled, or straight edge? My tile guy basically had the tiles close enough just to not be touching each other, but the grout lines are still 1/16" because of the bevel. If he had spaced them 1/16" before hand, the lines would have been huge because of the bevel. I think it may just look big to you, but it's not.

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My backsplash tiles were straight edge, and spaced 1/16". The grout lines are the same really.

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Look at HCloudy's recent post about their grout troubles. Now there is an example of a bad grout job.

Yours looks just fine, and you are lucky you don't have a job that looks like theirs.

Your lines are straight and even, which is better than what I ended up with in the shower corners! So yep, I think I would be fine with what you've got.

I see absolutely nothing wrong with that picture. What do you see as the problem? Are some of them slightly different widths?

They don't look as big as 1/4" from here. They do look clean and neat.