Coincidentally, I received this email this AM...
Hi Denny & Drew,
I did an informal test recently on yeast strains. I brewed the same mild 3 times. The only difference in all of these was the yeast strains used. I picked 3 yeasts(WYEAST 1275 Thames Valley, WYEAST 1968 London ESB and WYEAST 1450 Denny's Favorite 50) pitched and fermented. The tasters did not know they were being used as guinea pigs. I asked each of the 12 people(of varying tasting experience) 3 questions: Which beer do you like the best? Why? Was there anything off-putting about the 2 you didn't pick?
Here are the results by strain:
1275 : 4 Favorite votes - Described by those 4: It is the smoothest, the Chocolatey taste is not harsh - like a milk chocolate more than dark chocolate.
1968: 2 Favorite votes - Described by the 2: Like the slight sweetness, the grain is more prevelant
1450: 6 favorite votes - Described by the 6: Most balanced, dryer than the others but still feels thick on the palate, I feel like I could taste the hops and the grain together more than the other 2.
No one has any off-putting information on the other 2 Milds and said they liked all of them. Most said that picking between the 3 was like splitting hairs but that the 1450 stood out the most(this was even in the ones that did not pick it as a favorite.)