No I dont. In the 90s there were 24 bowlers with an econ of under 2.5. In the 2000s there have been 11.
Given the 5 bowlers with the lowest econ rates in the 90s were WJ Cronje, SLV Raju, TBA May, CR Matthews and W Watson I dont think fear had much to do with it.
Those aren't the sorts of bowlers I'm referring to, though, although Craig Matthews was a fine bowler and I'd imagine you know it with your recent South African experiences.
It doesn't have to be about economy-rates of 2.1-an-over, or suchlike. I'd say it has most impact on the sort of spells which might once have gone for 3.2-an-over; these are now going for 4.2-an-over. Bowlers like Shaun Pollock and Glenn McGrath, and Murali too, maintained their economy-rates accross the divide-line. This suggests to me that it's a problem with newer bowlers not being good enough, and this not-being-good-enough meaning they're treated with far more disdain than they previously would have been.
Then bowlers like Mohammad Asif, Stuart Clark, etc. have emerged in the last year or two; these bowlers have shown it's still quite possible to a) bowl with good accuracy and b) make batsmen realise that you don't take liberties with this sort of bowler.
You see what I'm saying? Mohammad Sami is probably no lesser bowler than Heath Davis (no offence, obviously Heath), but the gap in their records is massive.
On the other hand, I'd still back a bowler like Allan Donald to maintain a good-but-not-oustanding economy-rate. Heck, even Dale Steyn, who lacks Donald's height and is probably not quite as quick, hasn't done too badly there of late.
Part-timers and fingerspinners like Cronje and May get treated differently, that's beyond question. However, these bowlers were never front-line wicket-takers, so again I don't feel the altered approach has made much difference there.