I've chewed dried leaves that I first soaked in sugar water. I made three quids, about 3 g (~9 leaves) each. Each quid was chewed for 15 minutes (the last one for about 10 minutes).
The experience was indeed milder than when smoked. I found that I could control when to enter dreamland and when to snap out out it. I plan to do it again, but this time chewing only one larger quid - 7g (~20 leaves). The advantage with chewing leaves is when you feel you've gone far enough then just stop chewing and spit it out. After10-15 minutes, the effects become noticeable, but I think that after 30 minutes you've pretty much chewed all the salvinorum A out of the quid, so no point in chewing longer than that.
I'll report on if this larger dose has significantly stronger effects. I found the first experience very pleasant. Another curious thing was that I noticed a slight aphrodisiac effect - so I might try to encourage my wife to join me the next time

.