Are you concerned about tannins, waterlogging, or something else?
As to tannins, I can understand wanting to skip the initial heavy leeching phase, although it's generally not harmful, and even beneficial to an extent. I'd just try to keep things in check with some carbon/purigen and frequent partial water changes.
As to waterlogging, a lot of the typical driftwoods are dense enough they can sink with little-no soaking. Even so, I'm a fan of bolting them to slate, not just to keep them from floating, but also to make them a little more stationary. a lot of people use stainless screws, I'm partial to nylon. I've heard of good results with zipties and fishline, and I imagine something like epoxy or gorilla glue would probably work.
I've never bothered, but boiling should accelerate both of these processes (waterlogging and initial heavy leeching).
I think the most important factor is how much you know about / trust your fish store. Do they quarantine new fish, is their stock generally healthy, do they do system-wide dosing of meds/etc., how's the water quality, etc. There is a lot of advice about taking care to not add the bag water when adding new fish to a tank; if anything, I would think adding pre-soaked driftwood would be potentially more risk (unless it was boiled or something twixt pet store and your tank).