Or use iCloud. You know, like it says in the headline of the article.
Because few people if any are going to hear the difference between AAC 256 and a bigger file, particularly when it's coming out of a mobile device?
I did a Foobar2000 ABX Comparator test between 320Kbps LAME, V0 LAME, 320Kbps AAC, 320Kbps Fraunhofer, 320Kbps ABR LAME, ALAC and FLAC. The lossy formats were derived from the FLAC original.
Between the lossy formats, there was little to no difference in sound quality. V0 had the lowest file size, which makes sense because it's a variable bit rate.
The difference between the lossless formats were nonexistent.
The difference between lossy formats and lossless formats were extremely clear. Because I listen to non-compressed music (as opposed to the 21st century's heavily compressed waveforms), the song I chose was 1812 Overture Telarc edition because:
Cannons provide high peak volumes
The choir entrance provides low volumes
The quality of the recording captures a large range of frequencies
It's an epic song to listen to and does not bore you when you listen to it for the 10th time
In most of the lossy formats, the peak volume of certain cannon shots were distorted. Low volumes were hard to hear. A certain ambience was removed from the original lossless version. The distortion was heavy, especially during the "s" sounds of the choir.
I could write a science paper on this...
Point being, the majority of people listen to the compressed music of the 21st century (see Death Magnetic). Which means the music is somewhat distorted to some extent already when in a lossless format, and when you transcode that music into a 320Kbps file, you won't really notice the degradation because the original itself was already distorted.
When the lossless original is distortion-free, such as the 1812 Overture recording that I tested with, the lost of data is clearly audible when you convert them into MP3s.
(compression in this post means dynamic range compression)
And it's often times not the device that limits the sound quality, but rather it's the speakers. The majority of users either go with the comfort of Apple's remote and mic or with cheap Skullcandy/JVC/etc. which don't even come close to replicating the fidelity of lossless music. When you have high-fidelity studio headphones and speakers, you can enjoy lossless music to its fullest extent.