PRINT OVER TCP VS PRINTSERVER

hI,I have always have my users printing via print server (windows server) and only in few ocacions i have had them printing directly using print over TCP, also know as IP Printing.

Our company just got bought out by a big corporation and they use always print over tcp.

I manage 18 offices each one with a windows server, the biggest one has 50 users and around 10 printers, the smallest one 3 users and 2 printer.

Can someone point me to an url or tell some printing over tcp VS print server points?
What is the standard.

Thanks