Quick answer: Intel WHQL driver 32.0.101.9150 claims big gains for Lunar Lake integrated Arc graphics, plus smaller boosts for Panther Lake and Arc B-series cards.
Intel has another Arc graphics driver out, and the release notes for WHQL driver 32.0.101.9150 claim some big gains on Lunar Lake. According to PC Gamer, Intel lists a 31% average fps uplift in Resident Evil Requiem at 1080p medium on Core Ultra 2 (Lunar Lake) integrated Arc graphics, and 29% at 1080p high.
Lunar Lake also gets an 18% boost in Assassin's Creed Shadows and 11% in Assassin's Creed Valhalla, both at 1080p high, plus a few smaller gains. Panther Lake (Core Ultra Series 3) integrated graphics get a more modest 5% in F1 25 at 1080p medium, and Arc B-series desktop cards pick up 6% in Avatar: Frontiers of Pandora and Monster Hunter Rise at 1440p high.
These numbers come from Intel's own release notes, not independent testing. The driver is available now from Intel.