Because it seems more appropriate for its nature, the general stream is in reverse chronological order with the most recent at the top (along with the text area for creating new cards).
The thinking behind this inconsistency between named streams and the general stream is that with a named stream, context and progression is important. You're often refining yours thoughts and adding to them so it makes sense to present the history in the order in which it was thought out. In contrast, the general stream doesn't necessarily have this connection between cards.