Oh, much > than. These are just estimates, and have not been vetted or peer-reviewed:
Small tubes (6922, 12A*7, 6SN7, etc): 1 second to turn amp off, 5 seconds to remove tube (1), 3 seconds to insert new tube, 1 second to turn amp on, 5 minutes of warm-up. Total time: 5 minutes 10 seconds.
Power and rectifier tubes (6080, 5998, GX37, 5AR4, etc): 1 second to turn amp off, 30 seconds to don Ove-Glove (2), 5 seconds to remove tube, 3 seconds to insert new tube, 1 second to turn amp on, 5 minutes of warm-up. Total time: 5 minutes 40 seconds.
Trip to liquor store: 15 minutes. Tube roll (worst case): 5 minutes 40 seconds. Math is hard.
(1) Assumes use of 'tube rolling fingers' where the nerve endings were burned away long ago
(2) No nerve endings = no pain, but the smell of burning flesh isn't a joyous aroma
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