No. Pretty sure he was undwr their effect for a long time now. There was a comic about this.
Shepard is something that allow the reaper influence to subtley trigger, but even without shepard the ibfluence woyld be triggered another way. Thats one of reaper's methods to help them harvest a cycle after all.
I think it is implied that Turians got spooked and jumped the gun a little too fast.
Least atheist Quarian be like