I guess it depends on where you live and where you're going. Let take two places right next to the interstate.
In Johnston, the new Caseys off 100th.
In Waukee, the new Kum and Go on Grand Prairie Parkway.
I'm just going to pick random places in different areas of town and test them out with light traffic (right now)
Ankeny-Mistress Brewing
J=23 minutes
W=31 minutes
Des Moines-Airport
J=24 minutes
W=23 minutes
Windsor Heights-515 Brewing
J=14 minutes
W=12 minutes
Des Moines-Lua Brewing
J=16 minutes
W=16 minutes
Altoona-Bright Side Aleworks
J=21 minutes
W=29 minutes
Indianola-West Hill Brewing
J=35 minutes
W=34 minutes
Grimes-Fortune Garden
J=10 minutes
W=17 minutes
Polk City-Fenders Brewing
J=17 minutes
W=24 minutes
Des Moines Fairgrounds-Craft Beer Tent
J=20 minutes
W=21 minutes
WDM-Fox Brewing
J=17 minutes
W=16 minutes
As someone who recently moved to the south side, I kind of agree with you. While Johnston (where I work) is physically closer to my home than Waukee, Waukee is much easier to get through. I'm either driving right through the middle of the city or I have to drive my ass around the entire city.