We just purchased a 2013 E70, and I can't say that I have noticed this, but do remember reading in the brochure about a couple of features that may be contributing to what you feel..

From the Brochure "Brake Stand-by pretenses the brake calipers when you suddenly remove your foot from the accelerator pedal. Brake Drying lightly dries the brakes when rain sensors detect moisture"

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~Scott

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Black Sapphire Metallic/Sand Beige '13 E70 35d, SP, NAV, Tech, Comfort Access/Seats
20" Style 214's Wrapped in Continental DWS06 Extreme Contacts

(SOLD) Alpine White/Sand Beige '06 E53 3.0, SP, PP, CC, RC, NAV, Sat Radio
19" Style 63's Wrapped in Bridgestone Dueler HP Sports-- Summer Shoes
18" Style 131's Wrapped in 255/55-18 Nokian WRG2 SUV's -- Winter Boots