No. The skill benefits in descriptions were just a placeholder idea for what they could do. The more recent thoughts I've seen on it is that they will merely modify the relevant equations, rather than boost the skills. So 5 will be the maximum ever.
Just curious: Does it say in the Guide anywhere that skills top out at 5?
I've looked through the Skills section, and there's nothing there that references a maximum limit, nor for that matter in the Building Your Character section.
if 5 is the max, then perhaps that should be added to the Guide in the relevant section(s).
Just my 2 decacredits worth.
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"When all is said and done, there's nothing left to say or do."
Its in the rules. The Guide did have a lot of stuff added, but then we had various accounts trash the place, and not many people have had the heart to re-do it.