quote:Is it correct to say that Connaught Irish is a quasi-standard?
No.
quote:given the collapse of Munster Irish since the founding of the state
Huh? What makes you think that?
All major and most minor gaeltacht accents will be heard on RnaG and TG4 and the few programs in Irish on the main RTÉ channels, along with some derived accents.
(TG4 and RTÉ share news personnel)
Most fluent speakers outside the gaeltacht (people like me) would be influenced by a gaeltacht accent - in my case and in many (most?) others, that will be a munster accent.