I haven't tested it but I seriously doubt that mechanic applies to crafting. You aren't actually doing anything together, so no point in increasing SP.
does any1 know if u actually get more SP when u in a party for crafting skills?
I did read however that they may introduce collaborative crafting projects such as boats? Perhaps it will be implemented for something of that nature.
OT, but please do try to keep in mind that the dark blue skin isn't the only one available for these forums and changing your font color can be a real eye sore.