is it ok to include goggle fonts in my WP theme or must I have them delivered by their cdn?
just trying to cover all bases
Don’t include them.
It’s faster if you use their CDN since there’s a big chance the visitors will already have the font cached in their browser.
Currently you cannot add fonts to the downloadable theme files (you can set them up for usage though). So you can either use their CDN or alternatively put in the documentation where to download.