An almost brainlessly simple alternative explanation is that autistic men are just more likely to wait until an older age to have children.
My dad was 32, almost 33 when he fathered me. That's not exactly considered old, is it?

Not nowadays, but in an earlier generation it would have been pretty old for a first-time dad, no?
My parents were in their mid-twenties when they created me.
More "proof" that we're just damaged subhumans?
thats funny my dad was 22 and my mom was 20 when I was born... im 22... am I too old to have kids without risk? lol sarcasem
I thought Downs Syndrome came from the sperm, in which case a mother's age would make no difference.
Negative. Increased maternal age is a huge risk factor for Down Syndrome. Specifically (according to Wikipedia): "At maternal age 20 to 24, the risk is 1/1490; at age 40 the risk is 1/60, and at age 49 the risk is 1/11."
I think Down's can come from either, but more often from the egg, because the longer eggs wait to divide for their last time, by far the more likely they are to not divide cleanly.
Am I the only one who sometimes watches really stupid, annoying or otherwise infuriating people and finds herself wondering "...
you were the fastest sperm?!"

Am I the only one who sometimes watches really stupid, annoying or otherwise infuriating people and finds herself wondering "...
you were the fastest sperm?!"

and the egg said "hello, please come in and fertilize me." Once they are forced outside the ovary, eggs just have no standards.
The egg's "standards" are the obstacle course of the female reproductive tract, complete with hellish burning acids.
Occasionally, though, some fool can win by dumb luck.
Or else, the egg at the finish line went rotten.
I thought Downs Syndrome came from the sperm, in which case a mother's age would make no difference.
Nope, in most cases it comes from the egg, in which case a father's age would make no difference.
lol my father was 24 when I was born
Am I the only one who sometimes watches really stupid, annoying or otherwise infuriating people and finds herself wondering "...
you were the fastest sperm?!"

I've known enough stupid jocks to know that "fastest" doesn't necessarily mean "most worthy".
(There was an episode of "Red Dwarf" that dealt with that very issue. Worthless people were replaced with the people they would have been had a more worthy sperm won the sperm race. It was funny.)
I am also now older than my parents were when I was born.