In reply to A faithful sans version of Garamond?:
Hrant,
The Rosario fonts where in use during a lot of years at the Cosgaya Chair in the UBA for all their printed materials and they where also used in print for a few books before being released at Google Webfonts this year.
I'm now flipping through a book set in Rosario, and I don't see any spacing problem (Scan attached).
