I suppose so I was running on x7 and the panel and email along with SQL went down for a few days. SQL was back immediately but the new panel and email services took a while
I would also like to know these questions. I emailed support but have gotten no response except "Some services may not be working during this transfer and most users will find that service is restored within 24-48 hours." That was two weeks ago!
just saying, i noticed in Corey's post,
they figured it would take about a week for the migrations.
(that was almost 2 weeks ago) and no follow up yet either.