Reply #33: You really need to brush up on your reading comprehension:

[Devils Advocate NZ]

Second paragraph of that article:

The altered gene also changed the flies' pheromones, chemical signals that influence mating behavior. As a result, the researchers show in the Dec. 5 issue of Science, the two groups of flies are not only fit for different environments but may also be on their way to sexual isolation, a crucial divide in the emergence of a new species.
http://www.sciencedaily.com/releases/2003/12/031208141435.htm

So, once again speciation - sexual isolation - has NOT occurred, but is described as being on the way. It is also said to be "a crucial divide in the emergence of a new species".

When that sexual divide is actuualy confirmed, THEN we can say proof has been found. Until then, all we can claim is that it is POSSIBLE that such division MAY take place, which is where we have been at for a long time.