Starters are some of the most "un-exciting" fermentations ever. Of over a dozen starters with tubes, smack packs or bottle harvesting, I have ever only seen one Krauzen or "activity ring."
All that really matters is that creamy band o yeast at the bottom.
That one is cold crashed, but even if it is a t room temp, you should see the sediment in the bottom. I use a stirplate, but usually stop it a few hours early to let it settle.
The thing is, even if it's NOT ready...a starter that at least is beginning to work, is STILL BETTER than pitching yeast without a starter. And POSSIBLY better than delaying pitching and leaving a wort sitting un yeasted, and vulnerable to other micro-organisms.
It may not be ideal, but if the yeast have woken up to start tackling your starter, than it going to be less of a shock for them if you dumped them into your wort.
There's is some thought that with starters the best time to pitch them is at "High Krausen" that means during active fermentation of the starter, NOT as we often do, after the yeast has flocculated. More than likely you are going to be close to high krausen at 12-14 hours, meaning the yeast will be pretty active, and if you pitch everything in you will be dumping yeasts that should be past the lag and starting to wake up.
I once had a brew schedule change and pitched a combination of a 10 hour starter and an extra tube of the same yeast which I picked up on the way to the brew, and fermentation took off really fast.
So it's up to you...you have yeast in suspension now, and you are brewing late today, so that's STILL a lot of hours of happy yeast activity in your starter...so I wouldn't worry...
I mean you CAN get another tube and pour that with the starter you made...or just use what you got...it's still better than NOT making a starter.
Hope this helps.