That support documentation is incorrect. Currently iCloud will ONLY download in the uploaded format, unlike iwork.com where you can upload in one format and download as another.
For example:
1) Saved straight from Pages (latest version) to iCloud http://screen-grabber.com/images/1988443967.png. This shows it can only download in .pages NOT .pdf or .doc (.docx I can't remember)
2) Saved from pages as Word doc, and uploaded while logged into web based iCloud, http://screen-grabber.com/images/726925046.png. The same as before you can only download in .doc NOT .pages or .pdf.
I used to use iWork.com all the time to transport files from my home Mac to my colleges Windows computers. Now I can't do this as easy as I have to save as a .doc and then I have to login to iCloud to upload the document, rather than clicking 'Share' and it does all of the work for me.
Please Apple, fix this.