There is an article by Paul Clifton on the BBC South website saying that introduction has been delayed due to issues with doors and that new services Southampton Parkway and Poole to Waterloo have been postponed. I can't find anything on the SWR website about it. SWR seem to have had their heads in the sand up to now about the well known problems with the 442's - it's very late in the day to be making changes to the timetable 3 days before it starts.