Lightroom 4 vs everything else

Lightroom 4 can handle sub folders (acdsee will display contents from multiple selected folders but subfolders show up as folders)

Lightroom 4 can handle more than one operation at a time, ie, exports. (acdsee won't let you do anything else until the export is complete)

I need to know if there's anything else out there that can handle more than one export at a time.

Thanks.