So I have a 5 year and a 2 year old. My eldest has watched this since he was 3 and he's now literally a maths whizz! He just gets numbers in a way me or my wife never did. He knows his square numbers up 20... and pictures them as squares... obvious maybe to us now as adults but I don't ever remember being taught in that way. He understands odds and even numbers, odds having an 'odd top' when arranged in a column of 2 wide. He gets prime numbers, and is able to tell me the prime numbers up to 109. He impressed the head of the school when they were singing "The 12 days of Christmas" she had asked what all the gifts added together would make (I'm pretty sure she wasn't serious) but my son imagined a large step shape and answered "78!". She was blown away!
So in no way is this show "dumbing down" kids tv content. That's a totally ridiculous comment. It's made my kids smarter than they would be without it- it's better then watching about dinosaurs or lego!
Oh and because of this show my 2 year old knows his 2,3,4,5 and 10 times tables. It's actually insane. Love this show.