If you take a look at the samsung mobile españa page in facebook, today they answered a question about ICS on our Galaxy R.
They said this:
"Samsung Mobile España Hola Joaquim, Galaxy R no recibirá ICS, ya que no podemos garantizar que una vez instalado ICS la experiencia de usuario sea perfecta. Saludos."
So, "Hello Joaquim, Galaxy R won't receive ICS, that's because we can't guarantee that once you install ICS in it the user experience be perfect."
I guess this is another "market" movement together with the phone not being produced anymore in order to make us buy an S2 or S3.
If at least they release the drivers or the source code...