Hi, Yakker,
That's my understanding too, but it doesn't stay in the supercharger in its liquid state - it quickly percolates down to the bottom cylinder induction pipe. If you give a full cold-weather several-shot prime, without (preferably your helpful volunteer) turning the prop between strokes, and then open the manifold drain, a highly impressive amount of liquid fuel falls out onto the path. Turning the prop between or during primes does seem to distribute it around a lot more evenly, it seems to give a much better start, and hopefully avoids what I feel (perhaps erroneously) is the risk of a large belt of liquid fuel pulling into the bottom cylinder all at once.