When the first are installed
There will be lots of these meters being monitored and probed by all kinds of tinfoil hat wearing 'concerned citizens' as well as serious and qualified people who could make a reasonable attempt at analysing them. Various internet forums will be full of reports about how they work, what they do and the 'faulty design' aspects that have been noted.
L&G and Sensus have prepared a can of whoop-ass, all set and ready to be opened onto them in the near future.