i have to smoke a lot of weed probably above 30% thc to get dizzy at all, and then it's usually pretty mild...
i got some killer couch lock, but was actually just laying on a cement floor for my first time smoking, and it was only some outdoors. my buddy kept packing bowls though cause it was my first time and he wanted to assure me a good experience so we had like 20 bowls in a couple hours.... idk, can't say i wasn't dizzy then, but as time went on i didn't get messed from outdoors.
as a seasoned stoner, like i said, i have to smoke all day doing high THC bud to get dizzy, and then it's not really even a strong dizzy, maybe just like a head rush getting up... nothing crazy.... so it doesn't matter indica or sativa for me really. just high thc.