it's complicated.

45 people. all of high caliber. all rush out to find teammates. individually.
after a while.
lets not count groups of 4 people.
the rest are like a mess.
not because others are isolated.
each person (try to &) connect with several people.
let's think of them as nodes in a simple, directed graph.
one connects to another if he think the other will join him.
one may ask it should be bidirectional, why directed?
because the other might not really mean what he said (diplomatic? tentative? look for more choice?)
mostly because edges are formed simultaneously
at 1 moment a person talks with several others

(record goes to Orry:  2 FB convo, 3 MSN convo, 2 Gchat convo, 1 Wave, and 2 QQ conversations, at the same time.. Finally done, yet still I'm 1 short for my seminar group.. Please drop me a msg if interested.. Thanks..)

some called himself & his direct successors a group.
some (intended or not) are in several groups
when a group has 4 people, all the people are deleted from the graph
the left over found that he had less people in his group than he thought.
--> trouble arise.
group of 3 cannot join group of 2.
some group hesitate to join another (ex: same skill sets, etc)
some are not actively searching for groups.
+.+

Disclaimer: Pls don't think much if you dont understand or dont want to read the mess above. Ha ha. I'm trying to convey how messy is the grouping process now. It is.