D PAD Magazine gave Metroid: Other M a score of 4.5 stars out of 5 (9/10). Here is the source: 

http://www.dpadmagazine.com/2010/08/29/metroid-other-m/

Yes, you could finish it in less than 3 hours but you had to be very good at it. I was refering more about a second playthrough, you know the game but still don't dominate it. Anyway, my point was that it's a short game compared to Super Metroid, the total time it takes you to finish the game  is equivalent to a second playthrough of Super Metroid.

Edit:  with 100%

I doubt that Corruption sold "poorly" due to too much scanning and backtracking. Those elements are what fans of the Prime series loved. New people wouldn't have been familiar with it one way or the other in advance.

More, I think it's due to Wii sales of "hardcore" looking games are unpredictable even when they're published by Nintendo and part of a storied franchise. People seem to forget what the attitude on the street was surrounding the Wii in the first year after launch. I know of many Gamecube owners and Nintendo fans who refused to buy a Wii because Nintendo "betrayed them with teh casualz". The Wii seriously broke Nintendo's core base; it took Mario Galaxy to drag those people on to the Wii at all, and even then, most of them just played Galaxy then sold the Wii or put it in the closet. (Spoiler alert: Nintendo's own capricious, bitter, hardcore fans can be their worst enemy.)

To the largely new, expanded audience Wii owners meanwhile, Metroid Prime 3 probably just looked like another one of those Boy's Games with some Space Robot Person on the cover shooting aliens. Why would they give the game a chance, even if it wound up being  a good game? Fans can't seem to get it through their heads that Metroid has never been a widely popular serious - only deeply popular with hardcore Nintendo fans. Corruption selling 1.5 million makes it pretty decent by the standards of past games in the series - only Metroid Prime 1, to date, has been the breakout title. it even odds to date that half the reason why it sold what it did on GC was because tons of people thought it was Nintendo's Halo, and bought it because they could finally have an alien killing FPS on their Gamecube.

Aggressive bundling and an 8-year franchise hiatus were what made Prime the hit it was, in all likelihood.

Got the game. Can't play it yet, my Wii is in the room of someone who is sleeping.

Looking at the cards I notice that all of them have narration on the back. I find this somewhat disconcerting.

You mean the art folio cards that were the GameStop preorder bonus?

Yes. They're kind of nice to look at, but not much of a preorder bonus wen you get down to it. And each one has a description - by Samus - on the back.

w00t. Got it, paid an extra $20 for the guide on the gamble that the guide would have a sweet-ass poster inside, and boy howdy did it ever!

Too bad i can't scan it, so you can all envy its awesomeness :P

Yeah, Prime 3 was such an annoying game. Never got far.

3 hours into the game.....AWESOMENESS!!!