I should certainly hope it's streaming and syncing at 320kbps.
While I have haven't seen the encoding data myself, they certainly sound comparable with the desktop client. From my personal experience, high end frequencies (Cymbals, for example) are a little harsher on lower bitrates.
Our tracks are in an Ogg Vorbis format. This allows us smaller file sizes compared to say, MP3. This might explain the file size discrepancy. The Ogg Vorbis site explains things a little more eloquently than I can, however.
The workaround is still a HASSLE for those with huge libraries. It has been about a month now. Knowing the iOS platform, it should not take this much time to fully test out the fix if one is even being made. Especially since we pay $10 a month! The lack of user requested features being implemented and the lack of customer support fixing our issues has put users like me on the very last nerve. This is why many artists look at streaming services and block their music from them. The lack of stability makes it seem like a joke. I've gone way too far in this post. I hope a fix is released within the week!
MattSudaRock Star 24
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I've just uninstalled spotify to clean out the cached data. I then re-installed, immediately went to settings and selected "Extreme-Don't resync", and also enabled "Sync Over 2G/3G". I went to the playlist "Coldplay - Mylo Xyloto" and enabled the "Available Offline".
After it synced all the tracks, the data usage for spotify was 62.1 MB. Assuming all that is just the coldplay album a quick calculation reveals:
Judging by the responses on this forum, beyond the Extreme reverting to high quality, some people might have not been able to sync at 320kbps.
We're aware of these corner cases and this should be fixed in the next update. Bare in mind that after the fix is ready to be released, it will still need to pass through the pipeline to be approved by Apple.
It's because they're all Swedish dumb asses. If you go look at their available jobs they're looking for Software Engineers out the wazoo all in Sweden of course. I don't think any Swedes have any real software skills especially not iOS skills.