frankell, the way docks are being transferred just now, you're lucky to get any exposure at all. Webgizmos have been making docks for seven years....over 450 or so sets (from one to 12 docks per set).
When everyone's docks are transferred, then you'll be able to judge the "visibility" time. Until then, why not just relax? The original purpose for this thread was to discuss WinCustomize in 2011, not just ObjectDock Backgrounds Gallery.
I understand you spend time in creating your art. So do others.... be patient until things reach an equilibrium or steady state.
As for Home Page visibility, representation is given on a first come first serve sequence. There are (thank G-d) many contributions, and each gets time depending how they come out of Moderation.