The former Sevilla star admits that when he was plying his trade in Spain he regarded Real idol Zidane as the world's finest.
However, since switching to Arsenal three months ago, the Spanish international has gained first-hand experience of Henry's ability and feels he is a superior performer.
"He (Henry) is a footballer beyond the normal," Reyes told AS.
"When I was in Spain I thought that Zidane was the best in the world. Now I am convinced that it is Henry.
"With these players, France are the big favourites for the European Championship."
Reyes went on to add that he had been left in awe by the facilities at Arsenal, and insisted that The Gunners have to be considered as the best club in world football.
"Arsenal is just incredible," the 20-year-old continued.
"It is the best club in the world, above even (Real) Madrid.
"The structure, the coaches, the directors, the journeys in private planesÇª
"Also (Arsene) Wenger's treatment of the players is very good.
"There is a lot of seriousness and respect in his work.
"And the players? What can I say about them?"