It's as simple as that.
Paul Qui likes it, so it has to be good right? This has been on my list to try for a while, but the Round Rock location has kept me away until now. I figured it would be similar to Quality Seafood, which it is in terms of having a totally unassuming, somewhat unmemorable atmosphere and a menu that covers all the fried seafood and Cajun basics, but Deckhand has a leg up in a couple of areas. Owned by a Thai family, there are a few Thai flairs on the menu, Tom Yum seafood soup (the perfect hang-over food, as the menu says) and papaya salad for example. And the oysters—which is what we were there for—are noticeably better.
I'd read that Deckhand harvests their own oysters, and when I asked John, our very friendly waiter, where they came from he told me they were all harvested near Rockport from Aransas Bay, Copano Bay, San Antonio Bay, and Galveston Bay. According to him, the quality difference is a combination of where they are coming from, timeliness, and how they are shucked (zero grit here).

Now before you go hating on gulf oysters (I understand, I have done it in the past, but really, there are generic gulf oysters, and there are non-generic gulf oysters), keep reading. We ordered a dozen to start with. Plump and creamy with a subtle but distinct sea salt flavor to the brine, they were mild but certainly not bland. None were as salty as those that come out of the cold seas of the northeast, and off-season (warm weather) oysters are generally not as full-flavored as cool weather oysters, but these were really flavorful. I'd been reading about a resurgence in specialization in the Texas oyster industry, but hadn't had a chance to sample any before (see end of post for links to suggested reading). I would love for Deckhand to go a step further and actually designate the appellations for them (just so I can nerd out and try to learn to differentiate between them), but I was very happy to finally try this place.