That's unfortunate. Can't believe they would need to send a SARB back to Japan in the first place - the cost of the freight to Japan would almost be worth more than the watch. Given you dropped it and it's a few hundred dollar watch, I would have been inclined to just take it to a local watchmaker to repair, unless there was a good reason you thought it should be fixed under warranty.
As for Grand Seikos, they definitely do have to go back to Japan for servicing. I've heard good stories and bad about their customer service, but they seem to be dependent on where you are located, and which local reps you're dealing with. I've had bad experiences with authorised repair centres for Swiss brands, and recently with my Sinn...
As a rule the whole watch industry is focused on selling more new watches not servicing existing customers. Rolex fanboys bang on about the amazing service network for Rolex being part of the appeal, so maybe they are the exception. Though again, if not under warranty you'd probably just send your watch to a good local guy.