The out-of-spec APN-based latency and corresponding network mgmt issues are interesting but should not greatly contribute to throughput numbers (as also explained in the target thread), so most users should not fear this - but definitely it should be fixed, and users doing certain things might be affected, e.g. those things mentioned in that thread (notably, cell-based VPN and gaming).
In the context of this thread, the important thing to note is Verizon devices currently get much better typical latency than XFINITY Mobile devices even though they share the same cell infrastructure. Hopefully XFINITY Mobile will fix this soon and can then say that it is not an issue - or in plain English "VPN users and gamers will see no difference when using XFINITY Mobile".
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