I'd say there is some truth to it, however it depends on some different factors:
1. Bodyfat. Someone that's cutting and is 25% doesn't need PWO carbs. If they need more glycogen, then glutamine/glycine PWO in high doses along with the whey. If someone is cutting from 10% to 6%, then they should DEFINITELY have carbs to maintain their muscle, metabolism, leptin, and fuel hard workouts.
2. Volume of work. If you're doing 5x5 hitting each "bodypart" once a week then you don't need much carbs. If you're doing hundreds of reps per workout you may need a lot of carbs. However this also goes along with number 1. An athlete that is lean and does good volume may need in 200g of fast carbs PWO. A fat guy that's 20+% BF and doing 5x5 taking in 50-100g carbs PWO is kidding himself and doing more harm than good.