Qwen3.6-27B tok/s claims miss old CPUs

Hot take: the explanation is directionally plausible, but it is too absolute.

• –The official Qwen3.6-27B model card describes a hybrid `Gated DeltaNet + Gated Attention` layout, so it is not a plain dense transformer with a trivial all-GPU decode path.
• –`ik_llama.cpp` documents a faster `HAVE_FANCY_SIMD` path tied to AVX-VNNI/AVX-512-style support; Intel’s i9-9900K spec lists AVX2, not AVX-512 or VNNI.
• –That makes it believable that an older Coffee Lake CPU can bottleneck hybrid inference, especially in a backend that keeps part of the compute on the host.
• –The big comparison trap is context length: 50k context is far harsher than the short-context runs people often post online.
• –The higher numbers on Reddit are likely from a different mix of variables: shorter prompts, speculative decoding, different quantizations, newer CPUs, or a backend that avoids the same CPU-side work.
• –So this is probably not “gaslighting,” but it is almost certainly an apples-to-oranges benchmark comparison.