Yup, those are exactly what I was talking about. Benchmarks show same or better specs, but if you took the same hardware configuration and run a game on ultra settings on each platform, you'll see how those benchmarks are not entirely telling.
Page 6 has Gaming benchmarks for some games.
Windows 10 vs. Windows 8.1 vs. Windows 7 Performance > Gaming Performance - TechSpot
Win10 ist still around the same or better than Win7.