I was pondering this and want some opinions

Hey guys, when I started smoking regularly a couple years back, me and my friends would smoke out of pretty small pipes. I then moved on to a pretty shitty ceramic bong (it had a carb so I guess it's more of a large water pipe) for a while. Now for the past few months I've been using a bubbler, it rips really well, but of course I don't get as high anymore as I did when I would use a tiny chillum pipe. I know my tolerance has gone up a lot (I'm on day 2 of my T Break). But the other day I smoked out of one of those one hitters that looks like a cig, and I got a good high that I haven't gotten in a while. So, this is the thing I was pondering. Does it have to do with me inhaling straight smoke in a smaller amount of time?