It does have a distinctive taste but how is that info useful to you? Taste is pretty difficult to explain and kinda subjective too, plus even good meth contains impurities which can alter the taste in different ways. Also different chemicals can have a similar taste.
So no, taste isn't a reliable way to identify meth. I you want to be sure just get a test kit.
Otherwise you can try to run different "home-made tests" to get an idea (this is not 100% accurate) if it's real or not. Such as:
- Seeing how it vaporizes on foil (without inhaling)
- The bleach test
- Acetone wash (meth is insoluble in dry acetone)