Although this is the latest ever the IRS has started accepting returns, they seem to think it will not affect the season significantly. They recently announce their start date to be Jan 31, 2014 for the first efile acceptance. They will not be accepting any returns including paper before that and if someone files by paper, it is more likely to take even longer to get processed.
Last year the season started a week earlier on Jan 24th but this was also later than normal. However, last year the IRS seemed have a good reason with all the last minute tax code changes that occurred with the bill from Congress. This year their are no such changes, so why do you think they have delayed it another week than the initial announced delay and do you think this will be a regular occurrence annually?