Yes, I have, as well as developed and packaged software for both. And not just a little. Your comment about how release cycles work is patronizing, and your diatribe is misleading.
Arch is at kernel 6.6.3.
Debian Stable currently has kernel 6.5 for those who choose to install it. Not that it matters, because a higher kernel version number doesn’t magically grant better performance. Specific changes may help in specific cases, but most kernel revisions don’t offer any significant difference to games. The more common reason to want a new rev is to support specific hardware.
Unless you have a very new GPU (released less than a year ago), your games are not likely to get any benefit at all from the latest kernel.
And unless your games require the very latest Vulkan features and you run them without Steam, Flatpak, or any other platform that provides its own Mesa, you’re not likely to get any benefit from a distro providing the latest version of it.
Practically everything else that games need is comparable across all the major distros, including Debian. (Arch might have hundreds of other packages that happen to be newer, but those won’t make games run faster.)
OP, choose a distro that makes you happy, not one that some random person claims is best for gaming. If what Debian offers is appealing to you, rest assured that it is generally excellent for gaming.