Very unfortunate behavior from Bard here. It's good that it revealed its source, but the fact that you had to ask means that Bard has zero hesitation to lift this site -- or any other site's -- content without attribution. If Bard didn't explicitly do the testing itself then it has zero right to claim "we" or "I" or any possession of performance results.
AI like Siri, Alexa, Cortana, and similar answer your queries by saying they found relevant information and pointing you towards sources. Bard, ChatGPT, DallE, Mid Journey, Stable Diffusion, and the other AIs that are part of the current crop answer your queries by providing relevant information as if it comes from themselves. Sources are obfuscated or only available upon request. I don't feel icky when I ask Alexa something, but I do when looking at ChatGPT or Stable Diffusion. The older AIs seem intended to help people on both sides of a query connect while the current AIs seem intended to replace people by presenting information as their own. We need to get back to helping people.