These articles make it look like they are:
This is an example of what would be a penalized viewport (fixed width):
<meta name="viewport" content="width=400, initial-scale=0.75">
This would not be penalized:
<meta name="viewport" content="width=device-width, initial-scale=0.75">
The reason seems to be that the fixed width version is considered bad for mobile usability.
So, am I correct? Is the fixed width version going to be penalized?