According to Scot McKnight (who is speaking descriptively at this point, I believe):
When it all comes down to it, ‘evangelical’ is about getting saved, and explaining all of theology through the lens of salvation. When it comes to reading the Bible, everything is read about how to get people saved, even if there is hardly an Old Testament text to quote, which is perhaps why the word ‘biblicism’ no longer applies to American Evangelicalism in a generic sense, which is also why American Evangelicals, mostly don’t need the Old Testament. Genesis 1 to 2. Add Genesis 3. And you can skip to Romans 3. That is the Bible of an evangelical.
This echoes a concern of mine laid out in a previous post.