CM raikou carries a sub you know. -.- Have you ever tried sub com raikou? It's pretty damn good in dw. Anyway, you just seem to be arguing out of preference instead of fact, so be it. Use jolteon if you want but it really doesn't have a niche, I firmly stand by that with all the evidence of much more viable electric types. Bulk is everything in priority infested metagame fast frail sweepers just don't cut it anymore. Ditto was only brought up as a better revenge killer, since that's the reason you continually harp on jolteon.
If Raikou is carrying Sub, then it loses out on coverage, and not every Raikou wants to make that sacrifice. Even if it does, here's a turn order for you:
Superbadd sent out Raikou!
1)Ash calls back Tentacruel! Ash sends out [something that breaks Raikou's sub]!
Raikou uses Substitute!
2)Raikou uses Calm Mind!
[pokemon X] uses [move that breaks Raikou's sub (AKA everything)]! Raikou's Substitute faded!
So now you're in the same position you would've been without using Substitute at all, but with 25% less health. You could attack during turn 2, but a non-boosted move won't be more powerful than a Specs Thunder from Jolteon. It's nearly impossible for Raikou to kill something with its Sub intact despite its apparently Godly bulk, so he's still prone to Revenge killing. Substitute doesn't change that at all.
I've used Raikou before, and it was fine, but Jolteon is better. Don't make accusations of me "arguing based on preference" when I could easily say the same of you. And fast frail sweepers aren't dominating? Tell that to Tornadus-T, Salamence and Starmie. Tanking a priority move isn't the be-all-end-all of an offensive pokemon.
As for Ditto, you could argue he's a better revenge killer, fine (it doesn't really compete with Jolteon for a team slot, but we'll ignore that glaring detail for a second). But then I can say that Keldeo is a better user of CM, so Raikou sucks. See how that works? The reason I'm bringing up Jolteon's ability to revenge kill is because he can do that AS AN ADDED BONUS. Revenge killing isn't his job; he's a Specs user, he punches holes in the enemy team. However, he's also fast enough to clean late-game and, yes, revenge kill.
2sly4u, Raikou actually has 5 more Special Attack points than Jolteon does, so it would hit slightly harder off the bat with a Specs set.
Yeah I know, but he's talking about the CM set, not Specs.