The shortgirls.net watermark is styled something like this:

short
   girls.net

Roughly, the 'i' falls a little to the right of the 't'.

• Semi-serif typeface
• Even weighted strokes, not too light or jagged on stroke edges
• The 'g' character is double-storey
• Used Narkisim initially, but this is a Windows font

Spec

shortgirls.net uses Edita Small for the logotype.

Calluna and Alverata PE (a bit stubby) are also pretty close matches.

tallgirls.info uses Hypatia Sans Pro (though sometimes still Narkisim on Windows), its tall ascenders and lean proportions make for a clean and elegant branding.