If the BG is set to entirely white then the text will indeed be black. However, even quite light BG's (which aren't fully white) do not trigger this switch. So hopefully they adjust this threshold. (Edit: they only do this for the background currently, not album artwork. I've seen album art which was white, completely drowning out the time and date.)
Unfortunately, even if they did that, it would not alleviate issues where there is too much detail in the background (as in a photo or perhaps some abstract art design). In that case the text would still be difficult or impossible to read, regardless of color, since it would blend into all that detail.
Unfortunately, even if they did that, it would not alleviate issues where there is too much detail in the background (as in a photo or perhaps some abstract art design). In that case the text would still be difficult or impossible to read, regardless of color, since it would blend into all that detail.