Yes, as there is no mention on any ICHG website of the rooms and their acutal stats, unlike many other hotels there is very little detail in the rate description fields when booking. Some of the other third party sites such as wotif.com do have better detail:

Economy Room 18sqm
Standard 28sqm
Deluxe High Floor 28sqm

Trip advisor has some travellers photos of rooms that show there is quite a difference, I suspect the lack of furniture and the closeness of the sole bed to the window indicates this to be an economy one: http://media-cdn.tripadvisor.com/med.../hong-kong.jpg