My brothers F has been his daily drive for the last three years, his clutch has started to slip over the past few months which he was thinking was down to clutch, but the symptoms are not those you'd expect, as in he can red line it without it slipping, we've not checked his but believe it is the arm.
My TF is a daily drive, back in September '15 after I'd done the front arms, etc. I decided to change the clutch fluid, couldn't get it to bleed, peddle just kept going to floor so left it a few days, when I went back to look at it, clutch peddle worked fine. Can only assume the arm was seizing and released itself on own when left alone.
My brothers TF, now that was deffo a seized arm, it blew the slave cylinder seals and was still as a stiff thing on viagra!!! Believe me, just undo the slave cylinder, try to move the arm by hand, if it moves relatively easy its not the arm, if it is stiff...enough said