David Wiltshire argues that dark energy may be an illusion due to misinterpretations of supernova positions, asserting that time flows differently in various parts of the universe, which could affect measurements of cosmic expansion. Critics highlight that Wiltshire's assumptions diverge from mainstream cosmology, which is well-supported by observational evidence. The discussion reveals that while time dilation occurs near massive objects, its effects are minimal over cosmic timescales, suggesting that Wiltshire's model may not accurately reflect reality. Additionally, the proposed theories by Wiltshire and Barbour lack comprehensive experimental support and may not align with existing data, particularly regarding high-redshift observations. Overall, the consensus leans towards the idea that alternative models, while interesting, are unlikely to replace established cosmological theories.