Slightly-slow page load for blank page
MAMP isn't really tuned for performance either. And also keep in mind Time to First Byte is not the only indicator of a fast website. You should consider overall perceived time and actual download time as factors as well.

CloudFlare talked about one aspect of this on their blog... for example: with Gzip compression, the web server has to wait while it compresses the output then send it along. That adds to your TTFB. So on first blush, gzip compression would appear to be a bad thing but in reality, your overall download time and file size shrink, and as a result, it's an easy win.

If your content doesn't change all that much, when you get your Craft site up live, you might also want to consider caching on the server level as well, either with Nginx (fastcgi_cache) or something like Varnish in front of Apache. Those layers add complexity (e.g. when and how to clear the cache?) but it'll get you super fast output if that's your goal.