I couldn't find recent summarized data for the (excellent) benchmarks provided via the sd-extension-system-info repo, so I went ahead and pulled/summarized it. Here is the median It/s for each GPU with more than 10 entries in the table (single GPU setups only).

Source: https://vladmandic.github.io/sd-extension-system-info/pages/benchmark.html

Note: updated (found an error in the original post where I hadn't actually eliminated dual GPUs etc.)