Yes these wide design with lots of outline curve are slow to paddle, especially if you are heavy and sink it a lot.
"Simmons" like shapes paddle much faster, with less row.

These outlines work great for "hotdogging" in small hollow waves, the number of quick rollers per wave is mind-boggling. The drawback is that they lack the speed and stability on the rail for drawing arcs on big wave faces. A good option in a quiver.