Unlike one hapless former member of this forum there's nothing inherently and intrinsically Buddhist about meditation, although Buddhism is certainly linked very strongly to meditation. This as as fat-headed as saying that eating a salad makes you a Buddhist because a salad is a vegetarian meal and vegetarianism is associated with Buddhism. It really is that silly.
To ask if Buddhism is true in this context is a category error, it seems to me. That the birth of Siddhartha Gautama was attended by a torrential rain of flowers falling from the sky is a supernatural claim to which we can bring to bear all the methods and tools of rational scepticism that we apply to all such claims. These are the buttons, boxes and bows of Buddhism - the dispensible trivia. More interesting are the issues of Buddhist practice such as meditation and whether these are useful to the individual and whether they work (bearing in mind JeremyP's question on the dowsing thread, "What do you mean by 'work'?"). In this regard asking whether Buddhism is true is like asking if irritation is light blue - wrong question for the job.