My GPU uses 3x the power of my CPU and has a heat sink less than 3x the size, so it kinda checks out.
I do wish I had gotten the 2-slot version instead of the 2.5 slot version – picking the wrong one (because I was standing in line on launch day and hadn’t had time to research the options properly) cost me having to get a new case and power supply.
When that happened to me recently, I switched to an even smaller case (albeit with a thicker GPU area) out of spite. (Antec ISK 600 -> Lian Li / Dan A4-H2O)