they didnt smoke Salvia they made oral infusions which are considerably less intense than a smoked extract. So most likely the level of intensity experienced by us alien westerners is considerably higher than the levels achieved by the plant's native users.
True, they didn't smoke it, but I don't think that necessarily means the experiences were
always less intense.
Slower to come on, certainly, but I think oral ingestion had the ability to produce similarly profound experiences as with smoked extracts.
If you look at Kat Harrison's healing ceremony, for instance, it's quite clear that she had a remarkably profound/intense experience, and it was all orally ingested. She may not have had the same rushing sensation that often accompanies smoked extracts, but I think the "end result" was of comparable intensity.
I'm sure not all oral experiences were always like that, but I'm also not sure that extracts are always more intense than oral. It's certainly easier to achieve more intense experiences via extracts, but that doesn't mean it's impossible to do so orally
