Are there any features present in body text that aren't present in labels?

[ReneZ]

I know that's harder to run the numbers on -- I thought maybe this had already been investigated and was curious what the findings were. 

It's not really more difficult. If you use any of the transliteration files in the IVTFF format, such as listed in the table here: You are not allowed to view links. Register or Login to view.

then you can identify labels that are not near a drawing element with the code "L0", just like this case:
<f57v.1,@L0>      dairol

The symbol preceding "L0" can be ignored.