I think so.
The Watchtower wouldn't agree with me. Too much of anything is counter productive.
It's like eating a good meal, and 5 minutes later ordering the same plate. You won't feel like eating because your full. Same thing with meetings or field service.
What would just kill me, was when I gave a full day in the field service and went to the meeting in the evening, and then a brother would ask if I would go out in the service tomorrow morning.... I would think, "gee, didn't I do enough, aren't you guys happy, can't I skip a day or two now and do something else"?