Dear L.G.: The two coordinate systems (Smaller Universe A and larger universe B) have different time standards accompanying their larger and smaller space standards. The thesis 'Twin Paradox & Time Dilation' resolved, w'out mathematics is actually a reference to the information at http://forums.delphiforums.com/EinsteinGroupie , which finds the physical as well as spatial universe in a constant state of accelerating expansion. The presentation you just read and are responding to is an abbreviated presentation of our universe at an earlier, smaller moment of time (Moment A universe, say, yesterday), and that same ('our') universe, at a later, larger moment (B - the 'eternal now'); hence there is a specific exemplary objective in the apparently 'surreal' setting.
That is to say, we are not actually talking about two different universes (A and B) here, but rather, the same universe at an earlier and a later moment, and the differences in the values of time that accompany the ever enlarging values of space. This is what is called a 'thought problem', since today's (larger) universe cannot be compared with its (smaller, relatively more dense) self, as it was yesterday.
'Trick'? Lloyd. I don't do 'tricks'. We apparently don't understand one another on this issue. Yesterdays universe was
relatively smaller and faster than - when compared to - today's, in a spatially and physically expanding (accelerating) universe. No. The expanding universe is
not slowing down. On the contrary. It's speeding up. The expanding universe has been recently and repeatedly measured to be accelerating. There's a tremendous controversy around this new information since '98 to 2000 and ever since.