All fine and well, but l'poel I've been to hundreds of Chabad Houses across 6 (does our boat count as 7?) continents and have never seen a Lubavitcher bochur put on a talis for shacharis at the amud or an aliya.
1. Can't bring a ראיה from Chabad houses.
2. I guess this is like many minhagim nowadays, which are established by practice which is based on ignorance.
3. טוט אלץ וואס איהר ווילט...
4. I have also never seen a Lubavitcher bochur put on a talis at the omud (except for Selichos) or an aliya.