There has been plenty of articles that have had some not so positive analysis of its (granted) short life. Some articles have taken it too far with verbal illustrations of "doom" for the Wii U, but let's not let that justify extremes on the other end, claiming that Wii U is in no trouble at all; Wii U is in a tight spot and is NOT suffering from "typical" new console jitters.
Some would have you believe that Ps3 and the 360 went through EXACTLY this or worse. They crawled out of the dirt on their hands and knees. They didn't become steady sellers until a few years in. But that is a lot of garbage.
The most immediate comparison that the "poor" attitude towards Wii U's performance gets compared to are all of the PS3 "doom" articles that we've seen over the years, as well as its supposed terrible performance. CNN even called Ps3 a "sinking ship" in late 2008, when it had been averaging over 660,000 sales per month that year!
Let's compare the early days of Ps3 with Wii U, shall we?
Month 1 (November): Ps3 (~400K), Wii U (~500K)
Month 2 (December): Ps3 (~850K; ~1.25M total), Wii U (~2M; ~2.5M)
Wow. It sure looks like Wii U is outpacing the Ps3. How could Wii U be in any trouble at all? But wait a minute. There's quite more.
Month 3 (January): Ps3 (~380K; ~1.6M), Wii U (~250K; ~2.7M)
Month 4 (February): Ps3's worst ever month (~240K; ~1.8M), Wii U (~150K; ~2.9M)
Month 5 (March): Ps3 (~985K; ~2.65M), Wii U (~146K; ~3M)
You might be thinking "What's the problem? They sold at about the same pace" But "pace" isn't the right word at all. Wii U and Ps3 might have reached similar sales milestones at the same time, but they didn't do it at the same pace. Wii U had an explosive launch. Why? We were told that they would be sold out until March. People ran out to get their Wii Us as soon as they spotted one in fear that they wouldn't get the opportunity again for months. But then December came and reports started coming in that Wii Us weren't so "sold out" after all. 1.8 million Wii Us later, it was clear that Wii U wasn't in that bad of shape in supply and Nintendo exhausted the demand faster than it could grow. I live not so far outside of Chicago and, personally, every store I was at in December had many Wii Us.
......by the way, did I mention that Ps3 didn't even become available in Europe until March 2007?
Ps3 sold a very similar amount to the Wii U in the first 5 months, WITHOUT Europe. Ps3's worst ever month, which hardly compares to Wii Us worst 2 months, happened as result of a very real lack of availability in a very big region. After that, Ps3 never even touched the 200K range in a month ever again.
"But Wii U just doesn't have its big software yet!"
So? PS3 and 360 never sold that poorly in a month, no matter how bad the software drought was at the time.
Let's look at how Wii U's early years "compare" to the Ps3's early days now.
1) Doom articles: Ps3 was given horrible press when it was pushing over 600K almost every month that year. Wii U is getting horrible press as the result of selling under 250K for 3 months in a row (basically Ps3's worst month ever, plus 2 worse, for a total of 3 times in a row).
2) Raw sales in first few months: About the same as result of Ps3 not being released in an important region.
3) Pace: Ps3 went down and then up, never to return to its low. Wii U went quickly and sharply downhill after month 2.
Clearly, Wii U isn't starting off like the system that it is often compared to, the Ps3.