Personal
preference.
 Wine are nearing to a 1.0 product and are very careful about what code
 enters their repository.
 ReactOS does not currently meet their strict policy.
 If you want to get code into Wine, you must submit your patches with test
 cases and if required, relevant links to documentation. 
 I have also ask the question on the WINE-mailinglist.
 The answer at
 
http://www.winehq.org/pipermail/wine-devel/2007-August/058929.html
 looks like, that the test-suites are not the only reason.
 Greatings
 theuserbl
  
 
I am so sorry you had to go through all that.
This one is my favorite.