No, no. Hitting the seed isn't the problem. Advancing the frames is the problem, since they take SO LONG. I think the Timid IV 31 all frame is... 114? You start at 1, and you stop advancing at 113, so you'll need to make 112 Pokegear calls. And if you haven't unlocked all the Elm calls (Pokerus, Kanto, show him Togepi), then you have to use Juggler Irwin to the north of Goldenrod. And his "Pokerus" equivalent call is like... 10 lines of stuff. Takes SO long.
Compared to say... Roamer RNG, or other stationary Pokemon RNG, in which case I just use Chatots. With that, I can advance 900 frames much faster than advancing 50 through the call method.
Really? BW RNG takes me no time at all. Do you search for the seed every time? That's probably why. I save the commonly used seeds on a text file so I can access it really quickly. Like...
Male, shiny, IV 31 all, non-ditto parents, Everstone Nature
(insert seed here) Ability 0
(insert seed date here) (insert seed time here) (frame)
And for encounter IV 31 all spreads, I RNG the ID and SID for shiny on that frame, so I just need to remember when that seed occurs.
White Perfect Spread
(insert seed here)
(insert seed date here) (insert seed time here)
So from there, RNGing takes like... 10 minutes. My record: 6 Legendaries RNGed and captured (non Master Ball) in White2 in an hour.