Rough summation of Tsunku's comment on his blog
-He thanks everyone for supporting the group
-Due to him being in treatment he can't guide the members directly on-scene as much as he like but because of that the members self-awareness have been growing higher and higher, proactively challenging themselves. This achievement is also a result of that.
-He called the current girls 福娘 (Fuku-musume? Daughters of Good Fortune/Luck). Getting a #1st place naturally demands hard work and true competency but without coinciding it with a certain amount of luck and timing, there are times when you just can't get one.
Getting lucky one or two times is nothing unusual but they have a special energy that can call upon those fortunes again and again. It's not about a just one strong girl either, in this era where the old and new trade places in the blink of an eye, to be able to get consistent and reliable results every time... every one of these girls have a great amount of luck on her side. That's why he called them Daughters of Good Fortune.
-He said that at any rate, just setting records is not enough. Records don't leave an impression in people's hearts, that's why he wants them to continue performing at a level that will remain in people's hearts while keep setting records at the same time.
-He won't lose to the girls energy and will keep doing his best composing music, directing their performances and producing the group as a whole. He asks everyone to keep supporting the group and himself.