class GenericClass<T> {
    func someMethod() {
        let anyObjectArray: [AnyObject] = ["test1", "test2", "test3"]

        print(T) //Array<String>
        print(T.self == Array<String>.self) //true

        print(anyObjectArray is [String]) //true
        print(anyObjectArray is T) //false - BUG
    }
}

let instance = GenericClass<[String]>()
instance.someMethod()