Well, for starters, I don’t play Dhalsim - and seeing your sig, you don’t play Sagat either, so I don’t think it would be too relevant. Second, one of us might just be a better player, so again, irelevant.
Putting this apart:
What is zoning - simply put it, it means the abilitty to keep your opponent in a certain range, where you have the most advantages.
The SRK Glossary - WIP - srk definition: "Finding the perfect distance to limit your opponent’s options. Ryu wants to find the distance from which if his opponent jumps over a Hadouken, he can easily Shoryuken them out of the air."
Zoning does NOT mean throwing fireballs only, so zoning does not equal fireball wars.
If that would be the case, Chun Li wouldn’t be called a good zoner, since her FB is pretty weak - but her amazing normals makes her a great zoner. On the other hand, Dee Jay has a fireball, but he is not a good zoner at all, because he lacks the normals to do this.
Sagat vs Dhalsim:
sim always beat Sagat. In SF2: http://curryallergy.blogspot.ro/2009/08/super-diagram-turbo-version-3.html
You can see what top players think of this match: the majority called it 7-3 Sim.
In SF4: in super : http://www.freeuploadsite.com/uploads/13567698571.png - F Champ made it and he called the match 6-4 Sim’s favour.
In AE: http://www.freeuploadsite.com/uploads/13567697661.png - a japanese chart - the match is 6-4 sim
Finally you can click for a tier list in my Sig.
Tournament results: http://www.ssfranking.com/matchup - Dhalsim dominates quite clearly
Why ? Well, I don’t main either characters, so maybe others could explain it better, but Dhalsim usually wins because he is able to keep Sagat in a certain range where he has the most advantages.
Yes, Sagat has a better fireball, but like I said, zoning does not mean just throwing fbs. Dhalsim also has the limbs that can keep the opponent where he wants, a.k.a. zone him.
And in my humble oppinion, if Dhalsim can beat Sagat at his own game, than he is a better zoner overall.
Btw, if you would only take into consideration the fireball, than Sim would be one of the worst zoners in the entire game, since his projectile is not great at all by itself.
Finally, a piece of advice - next time don’t be so eager to call names.