Oh, blendOS uses cloudflaremirrors.com during installation, which points at the Arch mirror it thinks it closest to you, and installation should be quite fast in North America (the blendOS package repo’s hosted in Germany, but it shouldn’t be too slow and doesn’t host too many packages required for installation). However, I do plan to make that configurable (as an option for users that know what they’re doing, or perhaps through a CLI installer for advanced users), and might implement it in the coming few days.