Source: Wall Street Journal Europe, 2010-10-25, page 1.
However, the triangle is not the cause. It can be very good. As here, for example.
Source: International Herald Tribune, 2010-12-18, page 1.
Because: The triangles are located below each other. One understands right away. They are black. They do not judge. The algebraic signs are still there. They do not substitute.
Design is fine.