Not a lot of talent in womens ball hence the discrepancy. Ice you can get some good plays on the dogs. I've seen a 60 point spread one time so 40-50 isnt as common as you would think.
You obviously do not know much about this sport. The game has spread out talent so much that there are more programs on the rise than ever before.
Most games don't have spreads anywhere near 50 or 60 nowadays. The few books who take women's hoops usually won't even put up a line like that on a regular game. The only reason the game is up is because it is the tournament.