Look at this sweet as hell layout with that well-placed gif, A+.
So let me say my own slow tagging is lately the result of some personal stuff that isn't actually related to the game, just affects my wanting to tag (or do anything). We'll call it a few "slumps", I guess, but basically that's on me, and I'm working on it, and I'm going to do better.
With that out of the way, let's talk about the general speed of tagging. Now this all might not apply to anyone else, and if it doesn't, carry on. I myself have a problem with padding my tags sometimes. More importantly, I tend to do that padding with more introspection than with actual usable action. There's nothing wrong with writing introspective stuff or writing long tags or writing shorter tags if that's what you want to do, but keeping up the momentum in a scene is important.
That might mean that we should be more proactive in our tags in order to get threads finished more quickly. Having a bunch of introspection is great for character development, it's not as helpful to your scene partner (unless maybe they're Jean Grey). I'm not saying to tag more or tag less or leave out your character thoughts (write however you're comfortable!), just consider the usefulness of being proactive rather than simply reactive. Do and say things your scene partner can work with and add to, and if you have a goal in your thread, help make it happen. If threads are engaging for all parties involved, then tagging will probably happen faster. Just something to think about going forward!