Let's Play Game: Things The Writers Had Forgotten
Plot-wise, it makes sense that Quinn and Puck would avoid talking about Beth.
1) They're teenagers. You can't expect them to face their problems like adults.
2) The experience from conception to birth was agonizing for both of them. They probably needed a year to recover from the ordeal.
WHERE IS IT
WHY DID THEY TEASE US
THERE WERE EVEN PROMO PICS
THEY LIED TO US
RIB I WILL HUNT YOU DOWN
I JUST MISS QUICK