The 28-year-old spent four years with the Tayside club before leaving for Blackpool in 2012 and during his time at United he had a close-up view of the club's young players such as Ryan Gauld, John Souttar and Stuart Armstrong, who have had praise heaped upon them for much of this season.
However, there has been something of a reassessment of Jackie McNamara's charges following three successive defeats over the festive season.
Robertson, who scored in the 1-1 draw between the teams at Easter Road earlier last August, told Press Association Sport that a more realistic appraisal of United's young guns is required but that their talent is undoubted.
He said: "I think people maybe got a little bit excited about how well they were doing because they were playing really well, and people might be over-reacting now that it's a bad spell.
"It's been three games in less than a week for them and it has been difficult for the young players to keep up that form.
"But they are all good players and I am sure they will come through it.
"I played with Stuart Armstrong for two years and also played with Gary Mackay-Steven.
"Ryan Gauld made his debut in my last game there but he was training for us for five months before that.
"He was 15 or 16 and you could tell that he was something a little bit special as he was running rings around people at that age.
"John Souttar didn't feature much under that regime I worked under but he has obviously come through and done well recently.
"So we are looking forward to a challenge when we go there".
Hibs travel to Tannadice on the back of a thrilling 2-1 derby win over Hearts at Easter Road on Thursday night which took them to within five points of their hosts.
Robertson believes there is no reason for the Leith side to be anything other than positive.
"It is an exciting prospect playing against United with the momentum we have built up," said the former Dundee player.
"If we had managed to beat St Johnstone at Easter Road (instead of drawing) it would have been an incredible run, but it is 10 points from 12 so we should go there with a positive attitude and hopefully we should get a win.
"It is going to be a different game from the Hearts game, obviously.
"Being at home, Dundee United will carry more of a threat and although they have been on a bit of a (bad) run that is going to end at some point.
"I just hope that it is not going to be Sunday.
"We have managed to close the gap and if we manage to get the win on Sunday that takes us two points behind them which is massive."
- Sports & Recreation
- John Souttar
- Ryan Gauld
- Stuart Armstrong