The 25-year-old Sussex keeper-batsman made a storybook start to his Test career by scoring a hundred on debut at Lord's, albeit against a weak and woefully under-prepared West Indies attack.
But in the last Test of the season, across London at The Oval, Prior found himself dropping catches and making a first innings nought against India.
In the intervening period it seemed he'd become England's chief sledger.
Prior, conscious the keeper is the man who is expected to gee-up his team-mates on the field, rarely let up with what some within the England set-up labelled "aggressive" cricket although former England coach David Lloyd branded it "puerile" chatter.
Meanwhile, at The Oval, former England wicket-keeper Alec Stewart - Prior's agent - highlighted a technical flaw that meant his client's footwork was below par because his weight was on his heels rather than the balls of his feet as the bowler came in.
However, in the second innings, Prior did bat for 93 minutes in making an unbeaten 12 as England saved the third Test although a draw gave India the series 1-0.
England coach Peter Moores, who guided the keeper's early career, said of Prior: "He can look back on the summer and say he has a Test match average close to 40 and he kept pretty well there.
"He's made some mistakes but he's learning and he's getting better," former Sussex wicket-keeper Moores added. "The challenge is whether he becomes mentally stronger from this game."
England's behaviour reached a low point during a seven-wicket second Test defeat at Trent Bridge where the scarcely credible sight of a jelly bean left on the pitch angered India's Zaheer Khan when he was batting.
Both Prior and the rest of the England team had turned down the volume at the start of the third Test.
Moores said he wanted England to make life uncomfortable for opposition batsmen but stressed that could be done while upholding the spirit of cricket.
"I know Matthew well and I know he's a good lad who respects the game and respects the people he plays against," said Moores. "He will have balanced it up and learned something in the process."
England and India, who both had a lacklustre World Cup, are now set to play seven one-day internationals with the first at the Rose Bowl on Tuesday.