It’s not the destination, it’s the journey — and in this economy, Americans are taking very different ones. Marriott’s fourth-quarter earnings report shows that well-heeled travelers are still shelling out for top-tier accommodations while budget and middle-income travelers are pulling back. A key industry metric, revenue per available room, jumped more than 6% for global luxury hotels in the fourth quarter. The hotel giant’s overseas travel business also helped boost the company’s results, with 6.1% grow ...