It is definitely a good point, but also intuitively more variance
would be seen in the lower bits of the IP address or port values
rather than the upper ones (when considering them in net byte order)
if all your connection or bindings are within a domain using the
same IP subnet address (while the port values are normally assigned
sequentially). This might have an effect if you have specially small
hash tables (e.g. of size 255), considering that '&' operation.