We do have the shipping times listed on 3 different pages accessible from the top nav (and bottom nav), one of which is labeled 'How We Ship'.. so I dunno. It's not really something I'd considered before this, or had offered as feedback (everyone so far has advised me that outlining your details on the Shipping page is the industry standard.) And I can definitely say that I have many more visits to the FAQ and Shipping pages than I have orders, so I'm guessing people actually do read them. But again, I can't say for sure, and I haven't seen complaints about it.
It also might have to do with the products themselves. These are unattached pieces of metal/wood for the most part, at lower prices than you'd see in a guitar shop.
Beyond that, Oberlo and Shopify are setup for these kinds of businesses, so users get a stream of emails confirming each order and tracking the package throughout the journey. That seems to be enough, so far, at least. But like I said, I think that's fair criticism and something I'm actually looking to change on the checkout. It would be great to load in a shipping time on checkout pages (this information is available from the vendors), but that's not supported yet, it doesn't look like.