I have the same reaction. In my own testing, DxO 5.3 trounces ACR/Lightroom in head to head comparisons, especially at 100%.
why don't you post yours, Robgo2 ? I read the same mantra from you on all the forums - but you never bother to post something yourself ... how about DxO 5.2 vs LR3 Beta on your Pentax (well - let us not use yours - let us use a 3rd party to be fair) and let us say some prime like FA50/1.4 ? let us say @ ISO 3200 ? publicly available raw file from the the 3rd party and post conversion parameters used in DxO vs LR so that we can reproduce that.