Well, I wouldn't read into it too much. Remember what came out exactly right now (April) last year.....Portal 2, Mortal Kombat, Crysis 2 and a new handheld 3DS release in US.
Also, consider a numeral other factors like the lack of pig-budget AAA titles, controversy from Mass Effect 3 and TekkenXCapcom spilling over, and people saving up for the Diablo and Max Payne in May this month.