Checks indicate F5's (FFIV +5.4%) sales performance improved in FQ3, as deals pushed out from FQ2 managed to close, says William Blair's Jason Ader in a note lifting shares. F5 partly blamed deal push-outs on its April FQ2 warning. Ader cautions he thinks FQ3 product sales growth will be negative Y/Y, thanks to a slowing application delivery controller (ADC) market. F5 is counting on an ADC efresh and new mobile and security offerings to boost growth. Deutsche is also making positive comments on F5, stating the company is set up for "a multi-quarter product revenue ramp in next-gen security and telco." FQ3 results are due on July 24.