They look reasonable / not insane to me. There is little benefit in smaller values except for constrained (budge or resource) environments, especially if you're using other methods to prevent abuse and ensure stability. The cost of the server resources these days, is less than the cost of the human resources to answer the support ticket about changing it.
AdamM This is a security feature for DDoS
It is anti-DoS feature that is completely bypassed by DDoS (rather than 1x10,000 input DoS you'd just do a 10x1,000 DDoS if it were limited), there is little benefit in limiting this.