Yep, 5.0 is definitely a slower meter than 4.5.
As far as price vs. club stats, higher price does not always indicate a superior club, and definitely is not an indicator of value. Look at the stats for the lvl 94 Nike vs. lvl 70 Versa. One is .5 better in Balance, the other .5 better in Precision. Same Forgiveness and Meter Speed. And the Nike is about $10 more expensive.