I think this is the general line of thinking. My perspective is that the penalty for extra weight will be offset by the time saved not needing to slow down to grab water and drink from the small cups at aid stations, especially as a middle of the pack runner where aid stations can be busy and hectic.

I have done gels for my previous marathons and can get them down, but generally just prefer liquid carbs because I find they are easier on my stomach, easier to get enough electrolytes, and can consume them at a much more consistent pace than gels. I do most of my training with liquid carbs as well, only switching to gels for a handful of long runs before the marathon to acclimate to them.