> there just weren't that many 20 year old developers in the 90's.
John Carmack was 21 in 1992 when Wolf3D came out, Romero was 25
Tim Sweeney was 21 in 1991 when he released ZZT
Ken Silverman was 21 in 1996 when Duke Nukem 3D was released, Todd Replogle was 27
Cliff Bleszinski (19) and Arjan Brusse (22) released Jazz Jackrabbit in 1994
Shawn Hargreaves (sp?) was in his 20's in the 1990's when he created Allegro and went on to Probe entertainment etc.
The games industry seemed to be dominated by 20-somethings in the 1990's
I could go on all day. Also, hundreds of teenage 'bedroom coders' were doing ports of coin-ops to home PC's.