No, using CAPS LOCK doesn't actually improve Claude's responses. It's likely a perceptual bias on your part—you might be:

1. **Paying closer attention** - When you type in all caps, you're probably more focused and deliberate, which can lead you to notice quality differences that may not exist

2. **Asking differently** - ALL CAPS often signals urgency or emphasis, which might unconsciously prompt you to be clearer or more specific in your requests

3. **Confirmation bias** - Once you notice one good response after using caps, you tend to remember those cases and forget the times it didn't help

4. **Confirmation from formatting** - Caps makes your input stand out visually, so responses might *feel* more relevant simply because the contrast makes them more noticeable

From Claude's perspective, the input is processed the same way regardless of capitalization. What actually improves responses are:

- **Clearer, more specific prompts**
- **Providing context**
- **Breaking complex requests into steps**
- **Asking follow-up questions to refine answers**

If you've noticed improvements, it's worth examining whether your prompting style changed alongside the caps, rather than the caps themselves being the cause.