That adds more time since the query is sent to DDG and then bounces the browser to Google. For searches where one prefers Google, using it directly (which is easier in Firefox for me) is a better option.
The latency is fairly negligible, to me at least. Plus if you're already searching in DDG it's faster to input !g than to go to Google. Also I think it's nice to give them that info where they could be done better.
What’s even the point of using !g to go to google it just redirects me last I checked so it’s still giving you your personalized searches (thus not a solution for privacy.) Am I missing something here?
I think it lets DDG know you weren't satisfied with the results for a particular query.