Yes, but he'd only get to choose from the choices that are already built in to the stock kernel (see allend's post above) and non of those are particularly 'large'.
To add to that, I looked up fbcon in the kernel documentation here
, and found the following:
Select the initial font to use. The value 'name' can be any of the
compiled-in fonts: VGA8x16, 7x14, 10x18, VGA8x8, MINI4x6, RomanLarge,
SUN8x16, SUN12x22, ProFont6x11, Acorn8x8, PEARL8x8.
So it sounds like the kernel has only a handful of fonts built-in, and this parameter can only be used to select amongst those built-in fonts. So in order to use this with another font like terminus, the kernel would have to be re-compiled to include additional fonts.