Don't get me wrong, I'm sure the decent to good musicians, I just don't believe their great, legendary musicians, in the Jimi-Clapton-Coltrane-Angus Young-etc. etc. sort of way.
But your right, I don't think Radiohead is masking bad musicianship with great songwriting in any way, they are slightly overrated as musicians, but I don't think this topic of conversation applies to them.