[XeTeX] lineskip is inconsistent

[Steffen Wolfrum]

Hi,

coming from ConTeXt I am still experimenting with different features  
of Xe(Con)TeX(t).

One thing I have found today makes me wonder:
Even though the lineskip is defined as 14 pt it differs totally from  
font to font. And only Times and Helvetica are on the grid.

I hope I made a mistake?!

Steffen


%!TEX TS-program = XeConTeXt
%!TEX encoding = UTF-8 Unicode

%\font\rom="Times-Roman" at 14pt
%\font\rom="Helvetica" at 14pt
%\font\rom="Times New Roman" at 14pt
\font\rom="GillSans" at 14pt

\lineskip=14pt

\showgrid

\starttext
...
\stoptext