See, I have a different understanding from that paragraph, including the last sentence:
"The first set of provisions that came into force last summer to strengthen Canadian citizenship and speed up application processing times are already paying off. New citizenship applications are being finalized in a year or less, and it is expected that the backlog of older files will have been eliminated by the end of this fiscal year. Individuals who submitted a citizenship application before April 1, 2015 will have a decision by March 31, 2016." Source: http://news.gc.ca/web/article-en.do?mthd=tp&crtr.page=2&nid=985259&crtr.tp1D=1
From my understanding, they are using the above date as an example, and not that only those would be finished in a year or less and everybody else (April 1-June 10) should wait 24-36 months. To me, this is far more important: "[n]ew citizenship applications are being finalized in a year or less. . ."