Well they were technically "late bloomers" when comparing their starting sales and later sales, but i get what you mean.
Like i said in the other thread, the WiiU is in its second year and is selling worse at $300 than the PS3 did in its first at $600. The WiiU sold 54k this week versus the 92.5k that the PS3 sold during the same week back in 2007 (its worst year).
Sure the WiiU could suddenly find success, but it's not something any sane person who has looked at the facts would bet on.
Conversely, the WiiU doesn't actually have to do what PS3 has had to do to recoup losses. The PS3 was and will always remain financial ruinous and this was during a much less choked era of gaming with only the on-set of tablets and smart phones. Had the PS3 come out now, Sony would go belly-up rather than just teetering on the edge of imploding. (Which, oddly enough, may happen to the Xbox brand.)
I think when people speak about blooming they mean that the WiiU is slowly recouping on its expenses and will ultimately end up profitable even with lower sales, and may help Nintendo rebuild its core, focus from here on out, and build up a new "rep" with gamers. Certainly anyone who thinks its going to end up with some crazy sales figures is... more than a little off.