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by WalterBright 3986 days ago
My 12" single of "Ipanema" from the B-52s is 3:58. The album version is 4:24.

My 12" single of "I'm So Excited" by the Pointer Sisters is 3:47. The album version is 3:53.

I doubt that'll convince you, either. But I recommend that you actually obtain a 12" disco single from the late 70's and a 45 and compare with your own ears. It's also fun to look at the difference in the grooves with a magnifying glass.