Just an update on this. I have my log in front of me.
Again, when I first started S&S on 12/02/2013, I used the 16kg for both drills. I finished the swing in less than 5 mins, and the TGU took 10:30 (though I think I was holding the high bridge for three seconds per rep). After sticking with the 16kg for a week or so, I slowly started working the 24kg in, one rep for a few sessions, then two, etc., per the book. I was only able to work out 2-3 times per week on most weeks.
On 1/19/2014, I had my first session of all one-handed swings with the 24kg.
On 2/9/2014, I had my first session of TGUs with only the 24kg.
Today (02/17/2014), I timed myself with the 24kg. The one-handed swings took me 5:55, so I'm getting close. The TGUs took me 7:35 (not holding the high bridge). I was surprised at that, because strength gains have always come slow to me. Remember just about 10 weeks ago, it took me 10:30 to finish the TGUs with the 16kg - and I've only been getting 2-3 sessions a week in, most of the time.
In addition to this, my home life has been extremely stressful. My appetite hasn't been what it should, and I haven't been feeling like eating much. However, I'm also trying to lose some fat, so it's OK in that regard. So, I'm on a calorie deficit and have lost about 8 pounds since starting S&S.
I think most of my friends probably think I'm too skinny - I'm now 152 at 5'10". But with my shirt off, I think I look better than I have in years.
Seeing my timing results from today, I do plan to start trying to increase my calories and begin to slowly build some muscle as I feel I'm very close to ordering a 32kg and beginning to work it in.