Yeah, that's looking like more of a diurnal cold core shower setup on Saturday. Some convection potential. Good odds for some downpours but it'll be hit/miss.
Really depends on location. Euro struggles depicting shadows (GEM excels). My area for instance is almost always overdone when a shadow setup is present. The map you provided shows me getting 0.4" ish in the next 3 days, which is laughable. My guess is my peak total is half of that and I probably realistically get a quarter of that.
Every system is different, but on average it likes to overshoot. I'm sure this isn't the first time this has been discussed.