i don't find the Elton 5.1's hugely dynamic and never have, there's compression baked into the mixes by design and to me every now and again its audible, not particularly detrimental or invasive but its there. Greg Penny talked about using compression in his new mixes in interviews around the time of the EJ SACDs and i can see where he was coming from, certain tracks are just less dynamic than the original Stereo - but i don't think that's necessarily always a bad thing.
Captain Fantastic is the most obvious example among the 5.1's that saw release, the original Stereo mixes are a virtual masterclass in their use of dynamics in Pop Music but sometimes things get kinda clumped in the 5.1, mercifully the spread around the channels counteracts a lot of that but the Surround mix isn't quite as dynamic as the 70's Stereo, i would say.
this is not to condemn the 5.1 mixes for lacking dynamic range however but rather to applaud them for their use of compression because if you'll recall Gus' 1983 "Superior Sound Of.." Stereo remixes, it was then made apparent that going back to the multitracks, many of the original recordings were hugely dynamic, way beyond Gus' original 1970's renderings on LP and at casual listening levels those 80's remixes were almost quite unlistenable in places because the softest passages were just way too quiet and if you cranked the master volume to hear that lower level content you'd later get your head completely blown off when things reached a crescendo and got very very loud indeed!!
where were we? oh yeah, the Elton 5.1's are dynamic as far as Pop music goes and aren't they just groovy! totally forgotten what point i was trying to make, if any! time for a coffee
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maybe baby.. maybe 
