Heartbreaking, yes. I was so excited for my brother when he texted that his new frame was supposed to arrive. We generally talk several times a week and seldom about much more than bikes, bike parts, bike rides, and bike projects. Yes, it's definitely a "First-World" problem, but I was really upsetting to hear him so disappointed.
Careful measurements of several most-comfortable reference bikes including two different 58cm Rivendell Atlantis and a 54cm Rivendell Sam Hillborne were supplied.I think the difference between expectation and reality was a result of different philosophies in how a bike should fit. I don't think it's fair to dictate to a builder "this is how you should make my bike."
I had a very similar experience years ago when I ordered a custom Waterford touring frame. At the time, almost every professional bike fitter that I worked with said I should be on a 56 or maybe a 58cm frame.
When I worked with Grant on the order of my first custom, I was floored by the idea that he was designing a 60cm frame for me.
My Waterford was beautiful and I tried to make it work for years before eventually setting up a 61cm Atlantis.
Turn around time: it's been about 3 months since my brother shared the news that he had ordered the Ebisu. He's a very humble guy (one of the many things I love about him) and doesn't like to brag about acquisitions. So, I'd imagine one could pad that time a bit depending.