I recently returned from traveling the Texas Eagle from Tucson to Chicago, with a bustitution from El Paso to San Antonio. I had been tracking this itinerary from Feb 16 up until my trip on April 3, and there were 5 missed connections prior to mine, out of 20 departures. 6 misses out of 21 tries is about 28 % missed. And the next one after mine also missed. If I was to do the trip again, I'd probably opt to book with an overnight in San Antonio. The 11 hour bus trip was NOT a fun trip - torrential rainstorm, screaming kids, etc.