Surely yes.I also feel that I write English much more slowly than you native speakers.so called "Practice makes perfect"(熟能生巧)
It also has something to do with personal handwriting habit.For example,some guys would like to use some signs to simplify their handwriting.
But you should keep in mind that Writing fast doesn't mean writing well!! For beginners,your goal is to write clear and correct and than with time and practice you'll make progress in both quality and quantity.^^