I also agree with you that a bright, shiny object is very important. For web products, it's a requirement to get past the first meeting. See my earlier post: Pitching without PowerPoint: 8 Tips for a First Meeting at http://www.kartme.com/node/31475
I'll qualify my statement on metrics by saying that, if your target angel investors aren't in your target customer segment, then you'll need metrics around usage to convince them of (a) the value of your bright shiny object to your target customers and (b) your ability to make it shine brighter. And I agree it's not about goals and plans. It's metrics about your past achievements and lessons learned.