Tests gauging the performance of Verizon's network just before and just after the official availability of the iPhone 4 show that the network has been able to handle the rush of new users with no real change in performance quality, GigaOm reports. Citing research from web application performance firm Compuware Gomez, an esimtated 500,000 to 700,000 new users were added to the system in the days following the iPhone 4 launch, but the firm says there was no noticeable degradation on the network, measuring only a four-tenths of one percent drop in network averages.