Cough, now that you mention the A319/A321, I'm also in doubt but I last flew those types 18 months ago, so my observation most likely stems from flying A320s exclusively over the last 6 months. Can I ask you to watch out for it next time? (I'm talking about a VLS increase of around 2-4 kts). I'm currently on my winter break so cannot check it out soon! If I'm not hallucinating and it does indeed happen, my hunch is it's a bit of instant insurance incase A/P trips?