The iMessage problem is something that needs to get fixed. It recently took my friend almost 30 days to get SMS to come through on her Android after switching. Google can make this work with Hangouts (when switching devices), but then again Hangouts is cross-platform.
In regards to this article, the title is a bit misleading. It notes a server glitch, but only talks about this server side problem in the last 2 paragraphs.