Redknapp says he left the Hammers in the hands of Roeder when they had the best crop of young players in the country, but the current Newcastle manager took them down to (what was once called) the Second Division.
Roeder Takes Pressure Off His Wonder-Kid
But Roeder claims he has moved on from then, and he won't let Newcastle striker Andy Carroll get ahead of himself as he attempts to force his way into the first team.
The 18-year-old was handed a four-year contract a fortnight ago, and with six substitutes' appearances for the senior team this season, he will again be on the bench at best for Saturday's Premiership clash with Blackburn with Michael Owen and Shola Ameobi leading the line.
Glenn Roeder: "I have worked with a lot of young players and we have a real problem in this country - as soon as they do quite well, how well they have done is blown out of all proportion.
"I had it with Jermain Defoe at West Ham, Glen Johnson, Michael Carrick. We had a number of players come through over a period of four of five years and as soon as they had played four or five games, they were world-beaters.
"They have a job on to be that, but we always run ahead of ourselves in this country about how well a young player is doing.
"He is just doing okay, and what he has done is earned himself a four-year contract that gives him an opportunity to have a career here at Newcastle.
"He has lots to learn like any other 18-year-old would have, but he has also got qualities we think we will develop, and as long as he works hard over the next few years he has the potential to become a first-team player on a regular basis.
"He certainly was a breath of fresh air at Portsmouth when he came on for 45 minutes. He made one or two people sit up - but that's all.
"I am very good at looking after young players and not letting the media headlines run away with themselves and let him start thinking he is better than he actually is."