The argument I'd make is that this longer process allows for real time verification, which I find preferable. People are either going to take advantage of provably fair functionality or they're not, and most of them are not. Those who are taking advantage are either going to only make a few rolls and be done, so it hardly matters if there's a few extra steps involved, and I'd argue that it's unlikely they would return to see the server secret after 24 hours anyway, or they're going to automate the process, so again it doesn't matter if the process is longer or not.
The major problem I have with a daily secret type setup is that it exposes the site operator to risk should that list ever get out. I agree that JD's system is a decent compromise, as at least bets can be verified every 10 rolls or so as opposed to every 24 hours.
The thing is those that want to use provably fair will not want to do the work for every single bet. They'll want to do it in batch. So why are players not simply covered at all time by a provably fair system? It's deceptive because a bet that might just not be provably fair will still show the same "provably fair" checking instructions, but not all bets will be provably fair, only those where the client seed was provided AFTER the server seed (which usually means not a lot of them). Easy for a casino operator to abuse by doing selective seeding, yet all bets would show roll as "correct" under that system, even if cheating was going on. That's why as far as I'm concerned, any system where server seed can be provided after a client seed is retarded.
It shouldn't involve extra work on every single bet. There is alternatives. Every player can be covered at all time. They can then later verify any bet at any time, easily, should they wish to do so. They can also run checks in batch on large samples. Someone could audit everyone's bets. You can verify after the fact if you got the right roll, even if you didn't take any step to get provably fair. If you're labeled as provably fair, that's what you should be getting by default. Not something optional that isn't explained to you.
(I think I'm going to use those two last lines for my main post.)