Haven't seen Suzy, but had way too many similar experiences with AMP girls. As soon as they see how big you are, you can tell right away by their reaction if it is going to be a good session or bad. Girls that like and can handle size, have shit eating grins on their face and show expertise worshipping the pipe. The others have a "fear of death" look on their face and their attitude goes to shit right away. Rush/halfhearted BJ with no DT, try not to allow full penetration during FS, limited positions during FS, "hurry finish" or "finish you with HJ".
Statistically speaking, 8.5" is "very large". (I know there is a lot of conflicting info but) 5.25" is the "average", with the bell shape curve of 80% of men being 4.25"-6.25." The remaining 20% split evenly, 10% above 6.25" and 10% below 4.25" on the bell curve. 5% of men are above 7" and 1% of men are above 8". So out of 100 guys she sees, 8.5" would be the largest.
In general, they don't like large guys, especially early in the day, because it wears out the vag and they still have a dozen more guys to see.