No it's not all. How long have you been smoking? Daily? 3 times daily? Schwag or chronic? What kind of physical shape are you in? Skinny or sporting some extra pounds? There's a lot of variables besides 23 days...
Okay, I'm pretty skinny, but I don't exercise much. And I've smoked weed for a while, but I didn't really smoke any for weeks up until that day 23 days ago. It was pretty shitty weed, I'm not exactly sure.
Weed has the potential to stay in your system for up to a 30 days but it varies depending on many things; how much you smoked, weight, how active you are, how much you drink etc etc.
This sort of discussion is frowned upon in CD since you only need to worry about this if you're getting drug tested