sterilisation?

hello,
I work in a pharmacy and had a training on a breast pump the other day, as we will soon be hiring them out (wont mention names) the rep who was training us said some interesting things regarding sterilisation of baby equipment.
I was under the impression that ALL baby items were to be sterilised untill at least 6 mths of age ( milton seems to be a bit old hat these days but steaming, boiling etc....)
well, she told me that some hospital,( didnt name it) did all these studies on bottles etc, with half sterilised and the other not, and the bacterial growth on both was negligable. apparantly this is because we are a western civilisation (!) and have clean water.
hmmm, anyway, just wondering if anyone else had heard or read anything similar, as I dont feel comfortable telling people this kind of thing as I havent seen the studies etc. IYKWIM?
any help or your views would be appreciated.
thanks.

Milton def doesn't kill all the bugs anymore as bugs mutate and over time become resistent so antiseptics, however i know of a couple of hospitals that don't sterilise anymore.

When my son was in the SCn nursery we were told you no longer need to steralize. They washed the pumps we were using but it was only used by one person and when that person was done it was sent to a steralizing place same with the bottles and teats.. but for home use they said we didn't need to anymore as long as everythig was washed in hot soapy water..

This was 4 years ago