I keep on reading that Android 4.4 supports Google Fonts but i'm currently having a painful e-mail coding experience where not only the webfont is not displayed but my text doesn't show up at all (no fallback font working).
I'm using the link tag to load the webfont:

<link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700' rel='stylesheet' type='text/css'>

and defining font-family to the parent table:

<table class="responsiveTable" style="table-layout: fixed; font-family: 'Open Sans', Arial, sans-serif; color: #000000;" align="center" border="0" cellpadding="0" cellspacing="0" width="650">

Here's the result on Android 4.4:

Mail on Android 4.4

What did I miss?