I think you and SolipsismX are twisting things around so much to explain why they didn't announce iPad mini sales numbers that you are practically saying the same thing as those you are arguing against.
Sure, Apple doesn't break out particular models from a product category when reporting sales, but as you yourself admit above, they do announce sales for a particular product like the iPhone 5, (and here is the part you left out... ) when it's new.
This is when they announce individual sales figures for a product, when it's new and when it's first released.
There is a long standing pattern of Apple releasing a new product and then announcing that said new product is doing well by releasing the sales figures of said product in it's first week, weekend or other appropriate measure of sales time. This is an unusual situation of releasing two products at the same time, but still we have every reason to expect that Apple would release the sales figures of the new iPad mini. It's the information that everyone wants to hear and everyone expects to hear.
The fact that they (seemingly) purposefully haven't done this, is in fact unusual.
They have never releases an iPhone and iPhone mini at the same time so you can't say that Apple would break up sales for a launch of two new items within the same category. They announced the unit sales of the new iPad products released last Friday. That's all there is and it goes along with their history of announcing a new product's sales. There is precedent for two new iOS-based devices launched at the same time so claiming Apple is being sneaky or lying needs to be backed up with some evidence.
Seriously, why ignore Apple's long standing pattern of only releasing one iPhone and one iPad at a time? Surely you have to see how releasing two new products within a category is different and yet you want to force some fuzzy accounting onto something that has no history unless you look upon it with blinders.
On top of that, there is nothing that points to the iPad mini sales being a flop. Every string you pull implies it's the iPad (4) that is being pulled up by this simply announcement of the new iPad products launched this weekend.