“fast ethernet” is defined as 100mbps. I know what you meant, but there’s an actual industry definition for “fast” ethernet…
Most of the marketing is showing a combined speed at 100% optimal conditions. Unless you live in a faraday cage and have 4x4 802.11 equipment on all of your 5Ghz devices, and 2x2 at least on all of your 2.4Ghz equipment, then do massive, consistent and continual one-way data transfers using UDP or something which doesn’t have window sizes and can support one-way no-reply transfers like with multicast, all with a perfect signal and the highest wireless PHY rates, you’re not going to even remotely see that much speed.