Does the Xperia Z1 Compact's rear plate doesn't made of glass?

If you are an Xperia Z1 Compact user, please feel your phone's back panel and check if it was made from glass or plastic? Well, we are asking this because Sony has update its product white paper and product page for Xperia Z1 Compact to explain that only the front side of the phone is made from glass. 

White paper

The white paper of Xperia Z1 Compact (both D5503 and M51w versions) has updated on February 6, 2014 to change the sentence from "Both the front and back are made of durable tempered glass" to "The front side of the phone is made of durable tempered glass". If you haven't download the white paper then you can click here to download the old version and click here to download the updated version. If you want to check both D5503 and M51w white paper then you can go here and download it there.

Before revision

After revision

Sony site

The product page of Xperia Z1 Compact (in the "features" tab) has explained that Xperia Z1 Compact has a durable tempered glass-made screen, but doesn't described that the rear plate has that durable tempered glass thing similar to Xperia Z1.

Promo video

Lastly, we'll check the Xperia Z1 Compact promo video. It only says "durable tempered glass" without describing where do the glass has placed. More details, watch the <official> Xperia Z1 Compact promo which are uploaded during CES 2014 one month ago.

Well, if you're planning to buy this Z1 Compact, will this change your mind?

Via