Hagrids is almost always real high. VC is generally moderately high , so there's rarely much deviation when it comes to those two. Where things are noticeable on a days crowd is usually reflected in attractions like FJ, Kong, Spiderman, Transformers, Mummy, etc.....As Brian said. Basically line/crowd time and attendance don't necessarily co relate , often due to less vehicles/trains etc. But in general, non holiday weekday line times aren't bad except for stuff like Hagrids.....And, generally the time of day has the most influence on lines. Noon to 5:00 is almost always the longest lines of the day. Early mornings are still the best time to visit theme parks and find shorter lines (except for AK that's best the last few hours when guests leave the park in mass)......Bottom line is that if you go to Universal on weekends, expect long lines. Weekends are almost always, high moderate to very high, stand by wait times, unless there's a weather event.