over doing it....

Querier.cs

    public class Querier : IQuerier
    {
        readonly IContainer _container;

        public Querier(IContainer container)
        {
            _container = container;
        }

        public T GetResult<T>(IQuery<T> query)
        {
            var type = typeof (IQueryHandler<,>).MakeGenericType(query.GetType(), typeof (T));

            var queryHandler = _container.GetInstance(type);

            var helper = typeof (Helper<,>).MakeGenericType(query.GetType(), typeof (T));

            return (T) ((Helper) Activator.CreateInstance(helper)).ExecuteHandler(queryHandler, query);
        }

        interface Helper
        {
            object ExecuteHandler(object handler, object query);
        }

        class Helper<TQuery, TResult> : Helper where TQuery : IQuery<TResult>
        {
            public object ExecuteHandler(object handler, object query)
            {
                return ((IQueryHandler<TQuery, TResult>) handler).Execute((TQuery) query);
            }
        }
    }