Has anyone started getting H1 B Approval notices for Change of?
Yes. Soon after the H-1B approvals started few attorneys have posted on their blogs that they received approvals for applications filed under Master Degree quota. These could be Change of Status cases F-1 to H-1B. There is a huge load on USCIS in adjudicating cases especially considering the new memo passed on H-1B Petitions for Computer Programmers. Lately, some groups in FB have posted usual H-1B approvals coming through. You have not mentioned category you fall under, but sit tight the approval should be coming soon. All the best.