Okay, so when I say the map is too small, or doesn't have any chokes between the points. I'm not just throwing it out there without some thought. If you look at dustbowl there is this bottleneck between the points in each stage. VERY easy to identify!
Frozen has no bottleneck where red can hold blue off and give them some time to set up new sentries. So a offensive team will just ROLL right through red after the first cap.
Now for some comparison shots!
Here I've made a unit of measurement in photoshop, it doesn't translate to any nice unit number in hammer, but it's something I can count and it's always the same size.
So there we have a baseline for how long you travel from setupgate->point1->point2.
On Frozen, the stages are much shorter (notably stage 2 and 3).
[Yes, both images are taken at the same scale, cl_leveloverview 9]