United secured their third win in four games under McNamara when they won 1-0 at Motherwell on Tuesday night after Gary Mackay-Steven set up Johnny Russell for the only goal on the counter-attack.
The pair and Stuart Armstrong, all Scotland Under-21 internationals, stretched Motherwell a number of times on the break in the second half and only the brilliance of Motherwell goalkeeper kept his side in the game before James McFadden's 73rd-minute introduction.
McNamara said: "There is a lot of ability here and it's just getting them to believe how good they are.
"I think some of the younger ones don't realise how good they are. There are some fantastic talents.
"For me, the other night, the forward line we had were the three most exciting players we have in the country.
"People were talking about McFadden coming back to Motherwell. When I look at our front three - Armstrong, Russell and GMS - it's exciting not just for Dundee United but for Scottish football."