Not any of the PoC. There are repositories around the internet building and working successfully though.
E.g. Spectre exploit example https://github.com/ixtal23/spectreScope
The KAISER[0] fix which is what has been patched by OSes for Meltdown only resolves full physical memory and kernel memory access. You can still use Meltdown techniques to read arbitrary memory in your process, but this seems expected.