Gotta laugh at that, anyway let's go through the list of who Wenger "made" and what they did before the greatest development coach put his hands on them:
- Gilberto - 26 when he came over, already capped for Brazil
- Sagna - 24, made the team of the season in L1 with Auxerre
- Koscielny - 25, had an absolutely brilliant season at Lorient willing them to a mid-table finish
- Nasri - 21, made the team of the year in L1, was capped for France
- Lauren - 23, a mainstay on a Mallorca team that finished 3rd in the Primera, won Olympic gold and African Nation Cup in the year he joined Arsenal, Wenger sure worked quick on that one
- Ljungberg - 21, huge prodigy out of Sweden, capped in the year he got to Arsenal
- Overmars - 24, a huge part of Ajax's CL win, capped 30 or so times before Wenger "made" him
- Anelka - 17, another prodigy, this time out of France, given the hype he underdelivered in the end
- Fabregas - 16, another prodigy, this time out of La Masia, saying he would fail without Wenger is hilarious
- Pires - 27, was wonderful at Metz and a huge part of the great Marseille team that lost the UEFA Cup final
- Viera - 20, you got to be kidding me, this guy was supposed to be a star from the get-go, you don't get bought by Milan in the 90s for funsies
- Henry - 22, same as Viera, just a hilarious inclusion
None of these players were world class before Wenger, and few were nearly as good after leaving. They were all world class under Wenger.
Gilberto - Was never anywhere near world class or a Brazil regular before Wenger, became one of the best in the world at his role under Wenger. Only had 8 caps before Wenger, ended on 89. Regardless of age, Wenger made him
Sagna - One good season before Wenger, developed hugely under Wenger. Never played nearly as well at any other club
Koscielny - Litteraly had 35 top flight games in his career at 25 before Wenger made him world class. 0 Caps before Wenger, ended on 51
Nasri - Was 21 and not established at all. Never near the elite. Wenger made him. Then went to City and couldn't play nearly as well as under Wenger.
Lauren - Developed massively under Wenger.
Ljungberg - Had 10 goals in 79 games in the Allsvenskan, which is a horrendous league. Few people in Sweden even knew that about him. Scored once against Denmark before signing, but was not one of the best in his youth age group, even.
Overmars - Already world class at 24 but developed more under Wenger. Kind of similar to him Robben developed at Bayern.
Anelka - A 17 year old, huge prodigy or not, Wenger signed him for 750k and sold him for 35 million, a world record transfer fee. Underdelivered as soon as he left Wenger, though.
Fabregas - A prodigy, but someone who needed development. Making a 16 year old into one of the best midfielders in the world is always impressive no matter how good he is at 16. Fabregas could not replicate his Arsenal form in what should have been his prime years at Barcelona or Chelsea, under Pep and Mourinho. Wenger was a genius.
Pires - Nowhere near an elite player at 27 when he signed. Developed massively at 27, which is unusual, and was called the best player in the world by some towards the end of 2001 ( even though that was an exaggeration at the time, in my opinion).
Vieira - Failed at Milan, until Wenger got his hands on him and made him a star.
Henry - Scored 3 goals in 2 seasons at Juventus, at 22, as a winger. Wenger saw potential in him, snapped him up, made the 3 goal in 2 seasons winger a striker, and he scored 228 goals for Arsenal. Had 74 league assists in 7.5 seasons as well, so basically 10 PL assists a season as a striker. However, in 2007 he left and scored less than 0.5 goals per game when Pep got his hands on him, at 30.