I see what you are saying. Street Fighter has always been about one thing: SPEED. Ever since Street Fighter II started to update itself with more speed settings, the idea is to be the faster character and perform the fastest moves and corner your character as quickly as possible. Oh sure there are tons of attacks and combinations to perform, but overall it is mainly about speed and how you can adjust yourself to be fast while still technical.
Tekken, on the other hand, values technical skill over speed. Yes, there are slow and fast characters. But it values how players perform attacks and how they are at performing combos than being about speed. Tekken is very technical, it takes into consideration different martial arts and how they would perform against each other. Street Fighter has "stances", but they are more fantastical than usual. Tekken understands that each fighting technique has rules, flaws and advantages, so when a player selects a character it is about mastering that character, and thus they tend to be much lower.
As an example, watch someone play Street Fighter then someone play Tekken. The Street Fighter player is likely going RATATATATATATATATATATATATA and pressing buttons like a mad man (not button bashing, but performing attacks as quickly as possible), whereas the Tekken player is moving around slowly and only attacking when there is an opening and maintaining momentum in a combo.
In an odd way, Dead or Alive is a mix between the two. It is very technical like Tekken but plays significantly fast just like Street Fighter.