Santa Teresa is a great fun little workout park. I do Santa Teresa approximately 2X per week - often before work for a quick one hour "speed" training rides. I also just do more of the park on weekends if I'm busy with other things and want a quick fun ride.
I've also tried to meet others for rides in the morning. It's fun once in a while, but the efficiency for a 1 hour ride isn't great for doing this all the time. Especially since I also don't ride at the exactly same time every day and it's tough for me to predict my schedule. Quick weekday morning workouts are just hard to coordinate in general.
I've never ridden ST much with jorgemonkey, probably for two reasons. We come from different sides of the park - him from Santa Teresa up Bernal Rd., and me from Almaden through the singletrack access beside the IBM parking lot off Harry. So coordinating for half a loop is tough and just doesn't make sense.
Also, jorgemonkey's a lot faster than me. I suspect he used to be 50% faster, but I'm smaller and became a lot faster now too. Yesterday morning I did a loop up Coyote Peak via the fire road, then the singletrack of Rocky Ridge and back via Stile Ranch singletrack all in under an hour.

(I had another 10-12 minutes on each end riding from/to my house via the singletrack by IBM.)
But as mentioned a couple times on
the other thread, Santa Teresa is more miss than hit during the winter rains. I try it sometimes after a couple days of sun. If I see the mud building up on the tires at all, which usually happens quickly in the first few feet, I turn around and go over to Quicksilver or other local parks. There's even some nice singletrack along Camden Rd. that's level but can give a fun morning muddy singletrack workout when combined with some small local hills.
Stripes has been wanting to do a Santa Teresa trip some weekend. She's not fast - about like I used to be, and wants rides of about 10-12 miles right now, which fits Santa Teresa. Sungchang has also been looking for a ride there together. So when I see a good weekend for this gathering between rain drops I'll post and let you know.
In any case, if you're coming from Santa Teresa via Bernal Rd., you may want to hook up with jorgemonkey as he's offered. If I see you there I'll say Hi. I'm a big guy on an XL Black Heckler with a yellow AM1 fork.