It's probably an impression pushed by people who didn't regularly use those versions of Windows.
W7 performed great and W8.1 (I skipped 8) only improved upon that speed and power efficiency. W8.1 with Classic Shell and before Metro spread throughout the system was my favorite OS-stays-out-of-the-way Windows.
W7 performed great and W8.1 (I skipped 8) only improved upon that speed and power efficiency. W8.1 with Classic Shell and before Metro spread throughout the system was my favorite OS-stays-out-of-the-way Windows.