The same principle applies to cut crystal wine glasses and chandeliers. You can probably visualize the Pink Floyd 'Dark Side of the Moon' CD cover. Technically, dispersion is maximized as light approaches the critical angle between the diamond to air interface. The resultant burst of color emerges close to parallel to the surface of the diamond. So if you look from the front of a diamond you are more likely to observe fire from a crown facet which is greater in size when the table is smaller.
Scintillation is the other casualty of a large table.
If a diamond had no crown facets it would appear boring. You get a bigger looking rock for less cash. But as table sizes get larger you must beware of the fish-eye effect. All rights reserved.