W3C standards were not necessarily created so that every web artist would go by the standards. Rather platform standards are only a guides that a programmers can use. W3C standards are good though they are slow in coming hand to hand with todays progressing Browser technology. Also if you use version 4 browsers
, there is no need to bring that up as a valid argument.
Well just if you are wondering if you really need to make you team site going by the W3C standards, i would say there is no need to. Though if you really care about following the standards, Go ahead, because your will certainly not attract more visitors just by puting a W3C logo on your site.