zip.uncompress() Appears to be a queue with slow performance?

We have numerous zip files that we download in our app that contain additional assets. What we have noticed is that in addition to the long delay in callback (http://forums.coronalabs.com/topic/48575-pluginzip-uncompress-callback-takes-a-long-time-to-fire/), the files appear to be processed one at a time in a queue! 

What that means is that if we have 10 zip files to unzip, even if we call zip.uncompress() on them, they are processed back-to-back rather than all at once. Combined with the delay noted in the aforementioned forum post, the result is a REALLY LONG and pretty unreasonable delay.

Have others seen this? Is this an issue that the Corona guys can please address? 

Thanks!
Andrew