Well, the analyses that I'm seeing suggest they'll see about $0.05 more per pledge. So, not "no gain", but very little gain, and almost certainly some cost as patrons leave the service over the price increase.
Before: 7-15% net fees - $100 = $93 or $85 dollars
Now: 8%+ net fees with near 30% fees for $1 and 10% fees for $10
That math is using net fees when considering the amount the patron pays vs the person gets. Patreon is pulling some shady math by pretending that the patron isn't paying the original fees as part of the total amount.
To me, it looks like for nearly all cases, fees are going to increase. I would revise my statement to "loss, not gain", even if all patrons stay on the service.